When people reach their 40s, they enter the time known as middle adulthood which involves finding their life’s work and contributing to the development of others through activities such as volunteering, mentoring, and raising children. What is the primary developmental task of this stage?

Generativity vs. stagnation

Explanation:

Generativity could be defined as a stage in an individuals life where he's out to cater for younger ones or upcoming generation

Stagnation is a point in an individual life where there is no much they aim at achieving, as their targets in life are almost going into less concern either being fulfilled by them or they can't put in much energy to fulfill them.

Most people in their 40's have resolved their lives to generational impact and stagnation, where they advise the younger ones, having a family, volunteering and build on successes they gained while younger.