The first one, Added removed or changed. Mutation as in anything that would cause the slightest change.
I did buu whats the question?
<span>The correct answer is d. the idea that T. rex held its tail aloft was supported by the studies of many scientists. This is how science works, things are discovered by having members of the scientific community do experiments and come to the same conclusion. Many of them confirmed this theory and a concensus was established.</span>
By dying after mating in order to feed the young.
