Concept:Forest conservation means protecting and maintaining forest resources so that cutting down trees is not suitable for this goal.
Explanation:Felling of trees involves cutting down trees directly.
This activity reduces forest cover and leads to deforestation.
It destroys habitats and disturbs the ecological balance.
Planting seedlings increases tree cover and supports conservation.
Preventing bush fires protects trees from being destroyed by fire.
Preventing tree crops guards young trees and helps them mature.
Forest conservation aims at sustainable management of forest resources.
Removing trees works against this aim rather than supporting it.
Therefore, felling of trees is the activity not suitable for forest conservation.
Answer: A. felling of trees