Which of the following factors is critical for the sustainability of ecosystem services?

The conservation of habitats is critical for the sustainability of ecosystem services because these services are reliant on healthy and functioning ecosystems. Ecosystem services include essential functions such as pollination, water purification, carbon sequestration, and soil fertility, all of which depend on the diverse interactions among species and their environments.

When habitats are conserved, the biodiversity within these ecosystems can thrive, which enhances their resilience and ability to provide services over the long term. Healthy habitats support a wide range of organisms that contribute to ecosystem functions, whereas degradation of these habitats can lead to a loss of biodiversity and a reduction in the ability of ecosystems to perform their vital roles.

In contrast, options like high population density, increased industrial activity, and urban development can often lead to habitat destruction and fragmentation, resulting in negative impacts on ecosystem health and the services they provide. Therefore, conserving habitats is essential for maintaining the balance and sustainability of the ecosystem.