TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: Which characteristic is shared by all cells? Answer: They need energy.

SOLUTION: All cells share the characteristic that they need energy.

PROBLEM: Question: Which is the best way to maintain a strong, fit body? Answer: a healthy diet

SOLUTION: A healthy diet is the best way to maintain a strong, fit body.

PROBLEM: Question: How many underlying principles does the science of biology have? Answer: four

SOLUTION:
Four many underlying principles does the science of biology have.