TASK DEFINITION: You are given a sentence and your task is to generate another sentence that supports the given input.
PROBLEM: The structural and functional aspects of the human body starting at the level of the cell and continuing to tissues, organs, and organ systems.

SOLUTION: The sequence cell → tissue → organ → organ system identifies the levels of organization of body structures in a human from simplest to most complex.

PROBLEM: Collisions between molecules are elastic (kinetic energy is conserved);

SOLUTION: Because collisions are elastic, energy can be transferred between molecules during them

PROBLEM: Fungi play a crucial role in the balance of ecosystems .

SOLUTION:
Beneficial fungi play a crucial role in balance of ecosystems.