4. Certain species of fish are unsafe to consume in high quantities because these fish O A. have high levels of metals in them from cancer-causing pesticides.
O B. contain vitamins that aren't water-soluble and can cause toxicity.
O C. ingest other fish that are poisonous to humans.

explanation:

okay now i don't know this but for the pints nothing else to say bye

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101