Answer:
Population of cactus like plants which grows in the hot and dry weather of deserts,begins the flow of energy in the desert food web. Because plants are the only producer of energy in every food web.
Explanation:
I believe your pointing to number 16, I believe the answer is B
Earth is the only planet so far known to have water on its surface
Estuaries are areas where fresh water from rivers meets salt water. As the river drains, it carries much nutrient-rich sediment. Many animal species depend on this food source to provide for their young.
