Answer:
Deforestation
Step-by-step explanation:
Deforestation is the permanent removal of trees to make room for something besides forest.
Deforestation has already caused the extinction of a large number of endemic insect species on the island of Madagascar, according to new research published in the March edition of the journal Biology Letters.
Lemur which are mammals particular go the Madagascar forest that lives on these trees are now rendered homeless and hence causing extinction of their kind