Is the Larvae the baby animal that looks totally different from the adult animal.

There is a distinct juvenile form many animals undergo before metamorphosis into adults. The larva's appearance is generally very different from the adult form including different unique structures and organs that do not occur in the adult form. So, yes the Larvae baby is very different from the adult animal.

Explanation:

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

3. dark matter

empty space could also be a simple vacuum