Wich body system makes the energy in food usable for the body to carry out its activities

It should be the digestive system as it absorbs the nutrients of the food into your body.

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.