I'm not very good at Biology, could anyone help me with a piece of homework?

Question 2: The leading cause of death is heart and circulatory diseases. One reason for this includes unhealthy lifestyles including poor diet and exercise.
Question 3: The answer is 223,000. Here is the work: Add all the causes of death from the table = 278,000. 501,000 - 278,000 = 223,000.
Hope this helped :))
2: Heart and circulatory disorders because the bad lifestyle choices and all of the greasly fast food places. 3: A lot