Married couples with children consistently report – satisfaction with their marriages than childless couples, especially when the children are –. According to marriage researchers, a discussion of – that takes place – the child is born can prevent later misunderstanding and resentment.

1. less,

2. adolescents,

3. roles and responsibilities,

4. before

Explanation:

Married couples with children consistently report LESS satisfaction with their marriages than childless couples, especially when the children are ADOLESCENT. According to marriage researchers, a discussion of ROLE AND RESPONSIBILITIES that takes place BEFORE the child is born can prevent later misunderstanding and resentment.

This is based on topics or research of Human development throughout the life span, which is basically starting from cradle and end in grave. That is, all that is involved in the physical, cognitive and psychological well being of humans, whether as a kid or through adult life.