Final answer:
Malaysia is the country most culturally similar to Indonesia, sharing a geographic proximity, colonial history, dominant religion of Islam, ethnic diversity, and cultural practices. Option A is correct .
Step-by-step explanation:
The country most culturally similar to Indonesia is Malaysia. Geographically and historically, both countries are part of the Islands of Southeast Asia, sharing a similar colonial past under European rule—Indonesia was a Dutch colony, and Malaysia was a British colony. The dominant religion in both countries is Islam, with Malaysia having a majority Muslim population like Indonesia. Furthermore, both nations have a significant number of ethnic groups and languages, contributing to their cultural diversity. Cultural practices, traditional attire, and cuisines also exhibit similarities due to their shared Malay heritage. Lastly, both countries are undergoing modernization, though Indonesia remains the more populous and geographically extensive of the two.