The correct response is: An atom wants a full outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.
This statement accurately reflects the behavior of atoms in terms of bonding: atoms tend to seek a stable electron configuration, often resembling that of the nearest noble gas, which typically involves having a full outer shell of electrons. They can achieve this stability by either transferring electrons (as in ionic bonds) or sharing electrons (as in covalent bonds).