According to milhaly csikszentmihalyi, is a heightened state of pleasure experienced when we are engaged in mental and physical challenges that absorb us.

Flow

Explanation:

The flow is a state reached when we focus on an activity that we find pleasurable so much that our sense of time becomes distorted. Being in a flow state leads to higher productivity and a as result, it can be a very helpful in many of life situations.

The flow is also referred sometimes as being in the zone or being hyperfocused.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

the answer is a. monarch