Question

part a: use the drop - down menus to complete the sentences. the algae bloom limits the plant’s ability to do photosynthesis because it limits the amount of dropdown available. fish end up dying due to an environment... which is an important input for dropdown. impact of algae bloom on biodiversity 100 90

Explanation:

For the first blank: Algae bloom blocks light (since photosynthesis needs light), so the first blank should be "light" as it's the key resource limited by algae bloom affecting photosynthesis. For the second part (about fish dying), fish need oxygen, and oxygen is produced by plants via photosynthesis (or from dissolved sources). If photosynthesis is limited, oxygen levels drop, so the important input for fish (respiration) is oxygen. But since the question's second drop - down context (after "input for") likely relates to fish's survival, the input for fish (respiration) is oxygen, and the environmental issue is low oxygen (hypoxia). However, based on the first part, the first blank is about what's limited for photosynthesis: light.

Answer:

First drop - down: light
(Note: The second part of the question is partially obscured, but for the first blank related to photosynthesis limitation by algae bloom, the answer is light. For the fish part, if we assume the second blank is about what the input is for (fish respiration), the input is oxygen. But based on the visible part about the first blank, the answer for the first drop - down is light.)