A predator of that fish. Or if the fish can only lay eggs in an environment with current. Also temperature can effect if it will survive or not.
Answer:
matter is: Anything that takes up space and has mass
Acidic groundwater dissolving limestone
Answer:
The answer is B
Explanation:
The definition of a light year is the unit of astronomical distance, though it is called a light year it is actually a measurement of distance, so the answer, "the time it takes light to travel 1 million km is the correct answer.