it would flood
The area was a deciduous forest, and all the trees would change colors in the fall.
the clearing of trees is deforestation
Runoff from the field sprayed with herbicides polluted the river. The heavy rains caused runoff that eroded the hill. We planted trees on the hillside so runoff from heavy rains would not cause erosion.
The commonest terms would be a stand, woodland, forest of trees.
in the trees
In a forest
trees
animals,trees,ponds,waterfall,etc
the soil would be eroded
so they get as much sunlight as the trees do.
It would become a forest.
Oak trees ;)