My dad is very strict with his kids.
he's strict because he's Parenting. the process of promoting and supporting the physical, emotional, social, and intellectual development of a child from infancy to adulthood is called Parenting
Parenting
yes, it also refers to the intricacies of raising a child aside from the biological relationship.
Parenting
The most common caretaker in parenting is the biological parent(s) of the child in question,
Yes, but sometimes he can be very harsh.
yes sometimes.  although others may be an older sibling, a grandparent, a legal guardian, aunt, uncle or other family member, or a family friend.