The correct answer is C) extinction of plant species.
The extinction of plant species is NOT an impact of deforestation in Southeast Asia.
Deforestation is a big issue in South Asia. Many environmental agencies and non-governmental groups are worried about the deforestation of tropical forests in South Asia. Agriculture and grazing are two of the major reasons South Asia is losing an extended portion of tropical forests. The countries that have been suffering much affectation are Myanmar, Singapur, Thailand, Cambodia, Vietnam, Laos, Malaysia, and Brunei.