Voluntary

She signed up for a voluntary language exchange program to improve her Spanish.

They provided voluntary assistance to the elderly during the pandemic.

The library has a voluntary reading program for children.

The opening of the flower is a voluntary response to sunlight.

He made a voluntary effort to reduce his use of single-use plastics.

The formation of tubers in potatoes is a voluntary reaction to low light exposure.

The secretion of sweat in response to high temperature is a voluntary response.

Her sudden and voluntary laugh startled everyone in the room.

She made a voluntary donation to the food bank.

The museum has a voluntary membership program.

The company implemented a voluntary severance program for its employees.

The contraction of the pupil in response to bright light is a voluntary reflex.

She provided voluntary tutoring to help struggling students.

They organized a voluntary community clean-up event to improve the local environment.

The production of silk by spiders is a voluntary response to threats.

She made a voluntary disclosure of her tax returns.

He made a voluntary confession to the police about his involvement in the crime.

The sudden onset of vertigo was caused by a voluntary reflex in her inner ear.

The secretion of digestive enzymes is a voluntary reaction in the human body.

The landlord decided to give the tenant a voluntary rent reduction.

The couple signed a voluntary prenuptial agreement before getting married.

The organization relied on voluntary contributions from its members.

The athlete experienced a sudden onset of voluntary muscle cramps during the race.

They are part of a voluntary neighborhood watch program.

He made a voluntary contribution to the charity.

The company offers voluntary retirement benefits to its employees.

The organization relies on voluntary donations to support its programs.

She made a voluntary decision to switch to a plant-based diet.

He took a voluntary pay cut to support his company during the pandemic.

They participated in a voluntary beach cleanup activity.

They made a voluntary decision to leave the party early.

He provided voluntary technical assistance to the elderly.

She is a voluntary mentor for young girls in her community.

She joined a voluntary organization to help stray animals.

He chose to take a voluntary retirement to spend more time with his family.

They formed a voluntary association to promote cultural diversity.

She taught English on a voluntary basis to underprivileged children.

They participated in a voluntary survey on public transportation.

He experienced a voluntary shiver when the cold wind hit him.

His voluntary tongue movement was a result of the spicy food he ate.

The patient complained of a sudden onset of voluntary hiccups that persisted for several hours.

Her voluntary sneeze was caused by the sudden smell of flowers.

The patient's voluntary sneezing fits were due to an unusual reaction to allergens.

He was unable to move his hand due to a voluntary paralysis.

His breathing difficulties were due to voluntary hyperventilation.

The doctor diagnosed her with voluntary tremors, which were not caused by Parkinson's disease.

She experienced a voluntary muscle twitch in her eyelid.

The patient reported experiencing a voluntary cough that was not related to any underlying illness.

A voluntary muscle movement suddenly made her arm twitch.

The involuntary jerking of his leg was actually a result of voluntary muscle contractions.