Answer: The answer is the last option, Backflow of blood through a defective valve.
Explanation: Hypotension causes high blood pressure, and the other two options are not related to heart murmurs. A hear murmur is when the blood isn't flowing in the right direction causing the hear to beat irregularaly.
Answer:
An animal that eats grasshoppers
Explanation:
It's population must have reduced and then the grasshoppers population must have increased.
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