Which of the following is a key focus of the Shahada?

The Shahada, which is the Islamic declaration of faith, emphasizes the belief in the oneness of God. Specifically, it states, "There is no god but Allah, and Muhammad is His messenger." This declaration is fundamental to Islamic belief and serves as the first pillar of Islam. It encapsulates the core of the Islamic faith, affirming the monotheistic belief that God is singular and unique, which is central to the understanding of Islam.

While worship practices, the giving of zakat, and the importance of prayer are all significant aspects of Islamic practice, they are not the main focus of the Shahada. Instead, the Shahada specifically establishes the foundational belief in one God, making it a vital testament that every Muslim must profess to be considered a part of the faith.