Clifford is an astronomer who studies the movement of stars. What types of tools does Clifford likely have in his office that help him study the movement of stars?

1) meter sticks and protractors
2) rubber bands and paper clips
3) rulers and measuring tapes
4)telescopes and cameras

4. Telescopes and cameras

Explanation:

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.