Answer: Islam
Explanation: in Afghanistan the percentage of the population that practices the Islam is 99%, In Bangladesh is 90% and in Pakistan is 98% so from the options that is the cultural feature that most people share in those countries. There is a percentage of the populations of those countries that practices the Hinduism but it is small. The Punjabi is an ethnic group in some areas of India and Pakistan and the Sinhalese are also an ethnic group from Sri Lanka.
