NEET BIOLOGY

Detailed explanation-1: -The species population size is limited by environmental factors like adequate food, shelter, water, and mates. If these needs are not met, the population will decrease until the resource rebounds.

Detailed explanation-2: -When resources are limited, “competition, ” increases and some populations of organisms will decrease. Some individuals may even be weaker or smaller without the resources they need. Natural disasters, environmental changes, and humans can all have an effect on the availability of resources.

Detailed explanation-3: -Biodiversity loss can have significant direct human health impacts if ecosystem services are no longer adequate to meet social needs. Indirectly, changes in ecosystem services affect livelihoods, income, local migration and, on occasion, may even cause or exacerbate political conflict.

Detailed explanation-4: -Species play essential roles in ecosystems, so local and global species losses could threaten the stability of the ecosystem services on which humans depend (McCann 2000).

Detailed explanation-5: -The main direct cause of biodiversity loss is land use change (primarily for large-scale food production) which drives an estimated 30% of biodiversity decline globally. Second is overexploitation (overfishing, overhunting and overharvesting) for things like food, medicines and timber which drives around 20%.