local people have build their home and farm in the elephant habitat so that the reason why the elephant have to change their house. the second is the local people create road in the elephant habitat and then the elephant come to find the food around the road that have an affect on local community for example in case of khao yai national park that the sound of engine in big bike that very loudly so it effect to many animal especially the elephant. that reason make the elephant be moody and then the elephant may come to stop that annoying.
Next the elephat
new niche when the food in the mountain have not enough so the elephant will find another to have enough food. they will come to the local people farm and eat their fruit such as pineapple. and come as much as they can because the taste is better.
the second is create dam near habitat accounding to k'thoungbai said that the elephant will come to the dam and after finished it will come to eat local people farm. the last one is direction of finding food change. the elephant find the food by walk around the same area so when local people create road that mean elephant have to change their area to find food.