If atolls are built by corals secreting an exoskeleton, then how are atolls built? Answer choices: - important habitats - By coral exoskeletons - by fish - with machines - by a type of eel - It used to be covered by water - The area was once underwater - reusing materials
By coral exoskeletons

(Question)
If asleep-like state is used for conserving energy by some animals, then what is used for conserving energy by some animals? Answer choices: - hydration - food and shelter - bears - breathing - hunting - organic molecules - dormant state - sleep-like state
(Answer)
sleep-like state

Ques: If water vapor sometimes falls as rain, then what sometimes falls as rain? Answer choices: - Water vapor - Winter - trees - Metling snow - earth - soil - flooding - streams.
Ans: Water vapor

(Q).
If elms have woody stems covered with bark, then what have woody stems covered with bark? Answer choices: - bushes - h2o - elms - roses - oak - dogs - Spruce - bamboo
(A).
elms

Ques:If workouts have a positive impact on a human 's health, then what has a positive impact on a human 's health? Answer choices: - tuna - viruses - workouts - food - stamina - worthlessness - oysters - overwork

Ans:workouts

Ques: If using wind to generate power reduces greenhouse gases, then what can you use to generate power to reduce greenhouse gases? Answer choices: - bamboo - coal - fibers - watts - energy - fossil fuels - trees - wind
Ans:
wind