Question

which strategy is most likely to increase happiness?
limit chances of failure.
make good decisions.
generate more income.
pay closer attention to appearance.

Explanation:

Making good decisions can lead to positive outcomes, better life circumstances, and a sense of control and accomplishment, all of which are associated with increased happiness. Limiting failure chances may lead to avoidance of growth - opportunities. While income can have some impact on basic needs, beyond a certain point, its marginal impact on happiness is limited. Focusing overly on appearance can be a source of stress and may not lead to genuine happiness.

Answer:

Make good decisions.