Living and nonliving things that could affect the fish population?

living: predataors- frogs, bigger fish, birds, bears(depends on location),

          prey- insect, algae, seaweed, snails

nonliving: pollution, amount of oxygen in waters, pH levels

Explanation:

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.