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

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

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 using the bathroom
C) after petting a dog

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

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

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

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