The correct description of the spatial distribution of Islam would be closest to "60 percent in Asia, 20 percent in the Middle East, and 15 percent in Africa."
Islam has a significant presence in various regions, with a large number of Muslims living in Asia (particularly in countries like Indonesia, Pakistan, and India), as well as in the Middle East and parts of Africa. However, the exact percentages may vary depending on different sources and methodologies used in studies of religious demographics.