Selective exploitation means felling trees of specific ages and girths. It involves identifying and removing only those trees that are mature enough to be harvested and leaving the younger ones to continue growing. This approach is considered more sustainable than clear-cutting, where all trees in an area are harvested regardless of their age or size. By selectively harvesting trees, the forest can be regenerated naturally, ensuring that the ecosystem remains intact and that future generations will have access to the same resources.