How do the terms denature, catalyst, active site, and substrate relate to each other

Explanation:

The enzyme 's active site binds to the substrate. Increasing the temperature generally increases the rate of a reaction, but dramatic changes in temperature and pH can denature an enzyme, thereby abolishing its action as a catalyst. ... When an enzyme binds its substrate it forms an enzyme-substrate complex.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

i do not get it   at all