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 how valence electrons influence the bonding behavior of atoms. Atoms tend to seek a stable electron configuration, often resembling that of the nearest noble gas, which usually involves having a full outer shell of electrons. To achieve this, atoms may either share electrons (forming covalent bonds) or transfer electrons (forming ionic bonds) based on the needs of other atoms with which they interact.