Examine the food web shown in figure 5-4. what would most likely happen to the organisms in this ecosystem if the algae began to disappear

I'll give it to you simple...

Explanation:

...something eats the algae, and relies on it. Algae dispears, so does the thing that relies on it, and the thing that relies on the thing... so on... the ecosystem would completely UNFOLD.

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds