The correct options are
A Semi-evergreen forests are found in Servarayan, Kollimalai, and Pachaimalai hills.
B Tropical thorn forests are found in district of Dharampuri.
D The Sholas contain trees like Nilgiri champa, wight’s litsea, and rose apple.
Tropical thorn forests are found in the district of Dharampuri, Ramanathapuram, and Virudhanagar. Some common trees found in these forests are rusty acacia, neem, and palm.
Semi-evergreen forests are found in Servarayan, Kollimalai, and Pachaimalai hills.
The Sholas have trees like Nilgiri Champa, wight's litsea, and rose apple. Trees found in deciduous forests are silk cotton, kapok, kadamba, dog teak, etc.
The mangrove forest of Pichavaram is the second largest in the world, and it saves the eastern coast from tidal waves and cyclonic disruptions.