Answer:
D
Explanation:
The trout are disappearing from the river because of the thermal water pollution, which is causing the high water temperatures.
Answer:
I think it's because it will decay and be soil and soil is biotic factor
Answer:
Primary
Explanation: Pioneer species (bare rock,lichens, small annual plants, grasses), intermediate species(grasses shrubs and shade intolerent trees such as pines), climax community (Oak and hickorey)
Adults spend about 20% of their time asleep in rem sleep. Hope this helped, have a great day! :D