Which of the following activities will destroy an ecosystem?
Cutting down a forest to build cities
An ecosystem is made up of biotic and abiotic factors. Abiotic factors like air and water are essential for the survival of all organisms. Pollution of water and air will lead to the destruction of the ecosystem. Trees are biotic components of an ecosystem and are habitats to many animals like monkeys, birds etc. So the destruction of forests also leads to the destruction of an ecosystem.
Break down of plant and animal organic waste by decomposers leads to the addition of nutrients to the soil for plant growth.