Component is correct, ingredient is incorrectly written. A constituent is an individual substance, a component part of any one thing that makes up an object. When denoting a certain mixture, it refers to the kind of substance, excluding its weight composition, while when denoting a compound, it refers to the kind of element.

Example Sentences:

1. Learning sometimes changes only the components of thought and belief in a person's attitude.

2, Tears and sweat have similar chemical compositions, but while the former can only get you sympathy, the latter can win you success.

3. The noble component of love is no less than the gentle component, and the power to make people upward is no less than the power to make people wither.