Why do we have adversity?

As part of Heavenly Father’s plan, we must experience adversity during mortality. In some cases, adversity comes as the result of our own poor choices or the choices of others. Other trials are simply a natural part of our mortal experience. Though they are difficult, our challenges can help us grow spiritually and become more like Jesus Christ.

https://www.lds.org/youth/learn/yw/plan-of-salvation/adversity?lang=eng

{module Helpful Pages!}