Aheterogeneous mixture is a :
a. mixture that always contains water.
b. component added to sand that makes it inseparable.
c. mixture in which its components retain their identity.
d. mixture in which its components can't be separated.

The correct answer is letter C. mixture in which its components retain their identity. A heterogeneous mixture is a mixtures in which the component of the mixed are not uniform. You can see that there are localized regions that have different properties. The components have the capacity to retain their identity.

It changes food into energy that the organism can use.