A(n) is a trait that allows the organism to better survive and reproduce in the environment in which it lives.
select one:
a. fitness
b. adaptation
c. variation
d. vital force

Option B.

Adaptation is the trait that help organism to survive and reploduce in it's environment

Explanation:

Adaptation is the traits, behavioural or physical characteristics possess by an animal that enables its to survive and reproduce in the environments where it lives. The characteristics is categorized into three parts which are the body coverings, body parts and behaviors which help the animal to survive in its environment.

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.