Certain species of fish are unsafe to consume in high quantities because these fish

a. ingest other fish that are poisonous to humans.
b. have high levels of metals in them from cancer-causing pesticides.
c. are endangered species.
d. contain vitamins that aren't water-soluble and can cause toxicity.

don't guess, try to give the correct answer

A. ingest other fish that are poisonous to humans.

Explanation:

In a food chain a primary consumers eats the producer, a secondary consumer eats the primary consumer and then the tertiary consumer eats the secondary consumer. The level of poison will increase as it goes down the food chain so the tertiary consumer will have the highest amount of toxins in it.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

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