What major world events took place during seabiscuits rise to fame

In 1940, Franklin D. Roosevelt was re-elected. The electron microscope was invented. Winston Churchill became prime minister.

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.

choice 2 i like that prompt better.