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

A) loud music and traffic
B) birds singing
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 makes them happy.
B) it help them sleep
C) it can cause stress and hearing loss

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

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

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

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

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