Plz help me im stuck in this question

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.

Whats the biggest sea in the world?

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory