I'm not very good at biology, could anyone 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

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explanation:

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x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects