I really really need help. (If anyone can help it would be much appreciated. I am a home schooled student due to heart problems, so the only help I can really get about this stuff is from the internet

I really really need help. (If anyone can help it would be much appreciated. I am a home schooled student due to heart problems, so the only help I can really get about this stuff is from the internet. And I honestly have no clue as to where I should even start on this question. So, if someone could help me understand this better, I would be very grateful.)