Well in the intro you need a thesis at the end which is your resons for the essay. Well yes you do for the conclusion because your concluding.
A seems the most logical in this sense, since parents are portrayed (and majority do) sacrifice a lot so their children can live good and better lives than they did.
Answer:
First way: Jane Goodall studied about chimps by exploring among them.
Second way: She discovered many groundbreakings about the chimp behaviors
