What is the primary focus of Jihad in Islam?

The primary focus of Jihad in Islam is indeed a spiritual struggle against sin and the defense of the community. In the broader context of Islamic teachings, Jihad encompasses both an internal and external struggle. This includes striving to maintain one's faith, overcoming personal shortcomings, and adhering to moral principles as well as efforts towards justice and social change within the community.

While there are aspects of Jihad that may involve military engagement under certain circumstances—specifically, when defending the faith or community—this is not its primary understanding. The essence of Jihad is often more about the inner conflict and commitment to a righteous life than military action. Hence, the correct choice highlights this comprehensive view of Jihad, emphasizing the significance of personal growth and community welfare over purely combative connotations.