Step 1: Define domestic violence.
Domestic violence refers to physical, emotional, or sexual abuse occurring within a household or family, affecting women, children, and elderly members.
Step 2: Legal context.
In India, the Protection of Women from Domestic Violence Act, 2005, provides remedies including protection orders, maintenance, and counseling.
Step 3: Conclude.
\[
\boxed{\text{Violence within family (Option C) is domestic violence.}}
\]