Misunderstood about animal essay

We’ve always heard that the black widow is one of the deadliest spiders in the world, but while this is more or less true, it’s just not saying much. Completely unaggressive towards larger creatures, widow bites are quite rare, and lethal bites are even rarer – those at risk are normally only infants, the elderly or those suffering some pre-existing medical conditions. They’re still creepy though, right? With that whole “devouring the male” thing. Yeah, about that…of the 31 species of Latrodectus or “widow” spider, only two species have been observed eating their mates at all, neither of which are the famous red-hourglass black widow, and the cannibals in question were likely just frightened by their gigantic human voyeurs. Though the male is weak and snack-sized, the larger female normally allows him to escape or even hang around in her web a while, where her presence makes him a tad safer from an assortment of spider-eating things.

Explanation:

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

the answer is definitely d. sorry for a late response.