The human digestive tract is approximately 30 feet long.
Why is the length of the
tract important in regards to
the job of the digestive
system?

Answer-Because it is divided into eight parts:

the mouth, esophagus, stomach, small intestine and large intestine. Keep in mind that the liver, pancreas, and gallbladder also help digestion. The six organs work together to performs: ingestion, secretion, propulsion, digestion, absorption, and defecation.

Explanation:

i think the correct answer is b) humans who reduce their calorie intake by at least 25 percent on a long-term basis will live longer than they would have they not done so. i hope i you out