Short answers, pulled from the story.
Southeast Asia is the southeastern region of Asia, situated south of China, east of the Indian subcontinent, and northwest of mainland Australia. Its eleven countries, all members of the Association of Southeast Asian Nations, include Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand, Timor-Leste, and Vietnam.
American pastor Howard Malcolm first used the term "Southeast Asia" in 1839 in his book Travels in South-Eastern Asia. His definition included only the mainland section and excluded the maritime section.
Southeast Asia covers about 4,500,000 square kilometres, which is 9.80% of Asia and 3% of Earth's total land area. It is the third most populous geographical region in Asia after South Asia and East Asia, holding about 8.5% of the world's population.
Islam is the most practised faith in Southeast Asia, with approximately 240 million adherents, about 40% of the population, concentrated in Indonesia, Brunei, Malaysia, and southern regions. Buddhism is second with roughly 190 to 205 million followers, and Christianity predominates in the Philippines, eastern Indonesia, East Malaysia, and Timor-Leste.
European interests began as trade links centered on spices like pepper, cloves, and nutmeg, then evolved into annexation as traders lobbied for control to protect and expand their activities. By the 19th century every Southeast Asian country was colonised except Thailand, with the Dutch in Indonesia, the British in Malaya, the French in Indochina, and the Spanish and Americans in the Philippines.
Southeast Asia is one of the most vulnerable regions to climate change, with sea level rise along Philippine coasts running three times faster than the global average. Land subsidence sank parts of Jakarta by up to 28 cm a year between 1982 and 2010, and by 2019 the Indonesian government had committed to relocating the capital to another city.