Answer:

Step-by-step explanation:
If an enzyme is denatured, it loses its shape (unfolds or bonds break). The enzyme depends on its shape, so it can't work properly or at all if it is denatured.
The enzyme can be denatured if it is placed into a harsh pH (too acidic/basic), if it is exposed to high temperatures, and sometimes if it is shook/experiences physical action.
Basically, denaturing is when an enzyme's shape changes and the enzyme loses its ability to function.