Answer:
They were introduced by humans
Explanation:
I attached a PDF document, just take a part of it that seems to work the best, and put it through a paraphrasing tool so it doesn't get flagged for plagiarism
The Hamstrings are the muscles of the posterior thigh that flex the knee. The Hamstring Group consists of the semimembranosus, semitendonosus, and long head of the biceps femoris. The short head of the biceps femoris contributes to flexion of the knee but is not considered part of the Hamstring group due to its separate innervation.
D, Organism B.
8/2 is 4, the greatest average of both variables.