Which is the best definition of family planning a-studying a variety of forms of birth control to avoid pregnancy when someone is too young to raise a child. b- deciding when to have children and knowing what constitutes safer sex and reproductive health c- parents working with children to plan the number and spacing of future children in the family.

The definition of family planning is "the practice of controlling the number of children in a family and the intervals between their births, particularly by means of artificial contraception or voluntary sterilization". Therefore, answer choice C would be the best answer.

B- deciding when to have children and knowing what constitutes safer sex and reproductive health

Explanation:

when you are planning a family you would have to decide how many children u want and what time