Since there are no answer choices, I am giving the answer that I think would best fill in the blank correctly. The best answer would be:
manipulating
Answer:
the answer is D) a structure composed of a number of tissues that work together to perform a specific task.
Explanation:
all organs work together to keep us healthy. that's why they're called "organ systems." a system works together!
Very true.
Milk is a protein and builds up the body.
