HEY THERE! PLEASE HELP ME ANSWER THE FOLLOWING QUESTION- CORRECT ANSWER SHALL BE MARKED AS BRAINLIEST and be given 25 points♡♡ Question: "What does the doubled headed arrow for the tertiary consumers mean"?

*(the photo is what I'm talking about btw)*

Thanks)) have a good day yall

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

What is the name of the ocean current that affects the british isles? how does it influence their climate?

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.