Answer:
Option A, Absorption
Explanation:
Complete question -
The passage of the end products of digestion into the cells of an organism is an example
a) absorption
b) digestion
c) circulation
d) regulation
Solution -
Nutrient absorption occur in the small intestinal mucosa because it has large surface area as compared to the surface area of stomach. These nutrients are absorbed by the guts so that it is then released into the blood stream. The blood stream carries the nutrient along with it and transport it to the brain, organs and other parts of the body as per their requirement.
Thus, option A is correct
