According to the american psychological association, by late adolescence the heritability of intelligence is about percent.

75%

Explanation:

This result is taken from a study led by Robert Plomin  using twins as the main test subjects. This indicates that it is true that intelligence can be influenced by environment and genetical factors , but genetical factors since play a larger part.

Highly intelligence people tend to have the abiltiy to process new information at a much faster rate compared to normal people and have a naturally larger brain capacity to store that information longer. This basic ability cannot be replicated with training or nutrition.

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.