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

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

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

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

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

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

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

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

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

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