A) clean air and water
B) harmful substance in the environment
C) recycling

A) birds singing
B) a gentle breeze.
C) loud music and traffic

A) to have shiny teeth.
B) to remove plague and prevent cavities
C) to look good

A) burn trash
B) drive more cars
C) ride a bicycle

A) it can cause stress and hearing loss
B) it help them sleep
C) it makes them happy.

A) after using the bathroom
B) both a and b.
C) after petting a dog

A) drinking water
B) throwing garbage into rivers
C) watering plants.

A) by covering your ears or using earplugs
B) by shouting louder.
C) by listening to loud music

A) washing hands before mea
B) sharing a tooth brush
C) not bathing regularly.

A) improved memory
B) difficulty concentrating
C) clean thinking