Trees that BLOCK the view of oncoming traffic should be cut down.

What will happen if: we go on cutting trees

What will happen if: we go on cutting trees.

What will happen if : We go on cutting trees.

Answer the given Question : What are the adverse effects of clearing of forests or cutting down trees?

There are 15 trees in a row.4 trees are to be cut down.The number of ways that no two of the cut down trees are consecutive is.