As population growth and countries continue to develop the demand for large fish has been steadily increasing

The population is growing day by day and the food requirement is also increasing in the same rate. The treatment of large fish is also increasing because it is a supplement of protein and food for the humans.

Explanation:

The demand of life is increasing because in every country there are a lot of water bodies which contains fresh water and the land of country is surrounded by oceans or sea is which contains marine life. The people are dependent on plants and animals for the food.

Humans look out for animals as their part of food when plants does not meet all the requirement like minerals proteins etc. Fish is a good source of protein and it is very beneficial for the health of humans. Therefore the demand of large fish is increasing day by day.

the answer is "a.) well–developed vascular system."

explanation:

high growth (apex)