What do the activities of human fix

I would say we help in the control of invasive species because sometimes organisms should not be allowed in certain areas and we take them out of that ecosystem so it would be balanced.

Explanation:

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

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.