A good topic sentence is very clear, focused on the topic, directly relates the thesis, summarizes the main points of that paragraph, and strongly supports a claim.
Apparently this included "inappropriate." words or phrases, so I took screenshots of what I had typed, hope it helps.
<span>The speaker retells a story from Greek mythology, the rape of the girl Leda by the god Zeus, who had assumed the form of a swan. Leda felt a sudden blow, with the “great wings” of the swan still beating above her. Her thighs were caressed by “the dark webs,” and the nape of her neck was caught in his bill; he held “her helpless breast upon his breast.” </span>
The word would be sometimes that is not an adverb.
The answer will be channel.