1. What kind of system formed by the interaction of a community of organisms with their environment?

A. ecosystem C. estuaries
B. intertidal zone D. marine animals

2. A relationship shows how each living thing gets its food?

A. food chain C. food web
B. decomposers D. scavengers

3. A relationship shows the organisms that eat and get eaten in an environment?

A. food web C. food chain
B. ecosystem D. marine animals

4. Why do birds abundant in estuaries?

A. Birds can rest and look for food in estuaries.

B. It is their habitat.

C. It is their breeding places.

D. It is the place where they can get their mate.

5. Which is not considered a challenge in the intertidal zone?

A. moisture C.salinity
B. waves D. water level

6. Animals in the intertidal zone have different adaptation for them survive, which of these uses a root-like structure that attach to rocks or mussels thus keeping it in place?

A. Snail C. crab
B. kelp D. sponge

7. Salinity in the intertidal zone is higher as compared to other tidal zone. What could be the reason for this?

A. Salt trapped in rocks pools evaporates, leaving behind salt deposits.

B. More salt solution in the intertidal zone than any other area.

C. Higher concentration of salt is carried by tides.

D. Animals contribute to salt production.

8. Which of these water environment considered as "brackish water"?

A. estuary C. pool
B. ocean D. sea

Pa answer po kailangan ko na po ngayon ehh brainliest ko na lang po tamang sagot. plss