TASK DEFINITION: You are given a sentence and your task is to generate another sentence that supports the given input.
PROBLEM: Growth and Development of Bones Early in the development of a human fetus, the skeleton is made entirely of cartilage.

SOLUTION: Early in the development of a human fetus, the skeleton is made entirely of cartilage.

PROBLEM: All the matter in the universe is composed of basic substances called elements .

SOLUTION: Elements are pure substances that make up all matter.

PROBLEM: The speed of sound depends only on the medium through which it travels, not on its frequency, wavelength, or intensity (until the intensity gets so great that a shock wave results).

SOLUTION:
The speed of sound depends on medium.