The true statement is - Sympatric speciation only occurs in areas where there is local variation in environmental resources
Explanation:
Sympatric speciation means the evolution of new species from an ancestor species which are occupying in the same area and no geographical barrier takes place.
Overlapping of ranges takes place to the organism and old and new species are living i the same geographical region.
A dam diving a fish population could lead to allopatric speciation where geographical barrier causes formation of new species which are completely different from their ancestor species.
The European Nations left South East Asia during the 19th century.
The reasons include the presence of indigenous religions, western education, and the effect of socialism and communism.
<u> Explanation:</u>
European nations such as Portugal, Spain, Netherlands, Great Britain, and France had colonies in South East Asia. During the 1500s and 1600s, Europeans were able to gain power over South East Asia through trade and commerce.
The southeast Asian countries achieved nationalism through various approaches. The Buddhist and Islamic supporters of Burma and Indonesia respectively initiated national movements.
In Burma, new western-educated elite joined hands with Buddhist Monks and with other Burmese people.
In the Philippines, western-educated leaders fought against Spain. In Malaya, educated Malays were motivated into Civil service.
Meanwhile in Indonesia, the people who were educated from Dutch schools formed the P.N.I - Indonesian Nationalist Party. Communist and socialist activities played a massive role in Indonesia, Vietnam, etc.
