Complex sentence: The major threat to the species is the fragmentation, loss and degradation of the forest it lives in, which includes damaging human activities like agriculture, logging, and the clearing of land by fire.
Split into simpler sentences: The major threat to the species is the fragmentation, loss and degradation of the forest it lives in, which include damaging human activities like agriculture and logging. Another damaging human activity that destroys the habitat of the species is the clearing of land by fire.