Answer: A
Explanation:
Whaling is the practice or industry of hunting and killing whales for their oil, meat, or whalebone.
Answer:
the dissolved oxygen of the water decreases.
the fish need the oxygen for respiration, breathing through their gills.
Explanation:
The salinity decreasing doesn't affect the pickerel, because it's a freshwater fish. no salt needed.
more light penetrating the water just means that more aquatic weed or grasses would grow, giving the pickerel more area to spawn their eggs.
temperature increase in the summer has no affect on the fish, since the spawning happens in late winter.
The most logical answer is D, because, we can infer that they belong to the same genus in taxonomy, but they are different species
