Answer : 4. "Western Ghats"
Explanation :

Recently the Government of Tamil Nadu has launched “TN Endangered Species Conservation Fund” to protect lesser-known species like the Nilgiri Marten. This rare carnivore, scientifically named Martes gwatkinsii, is restricted to the Western Ghats of India, which extends to Karnataka, Kerala and Tamil Nadu. Found in shoal ecosystems, it has chocolate-coloured fur and a canary yellow throat, resembling that of a civet or mongoose. Conservation efforts focus on its habitat at higher altitudes (300 to 1200 m) in specific Western Ghats groups.