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

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

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

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

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

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

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

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