The circulation collects nutrient-rich venous blood draining from the digestive viscera. a) enterohepatic b) splanchnic c) hepatic d) portal e) pulmonary.

The answer is C: Hepatic Portal

Explanation:

The hepatic portal circulation is a venous system responsible for draining blood from the digestive tract (stomach, intestine) and spleen to the capillaries in the liver. The main vessel of the hepatic portal system is the hepatic portal vein which is formed by the confluence of the gastric vein, the pancreaticomesenteric and lienomesenteric veins.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).