Which explains why many modern electronic devices use integrated circuits instead of vacuum tubes?

A. They are much smaller and more efficient than vacuum tubes.
B. They are smaller but less efficient than vacuum tubes.
C. They are more efficient but larger than vacuum tubes.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

digestion

it excretes wastes

convergent boundary.

explanation:

the type of boundary that is depicted in the image above is a convergent boundary.