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

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

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

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

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

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

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

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

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

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