Question

the extinction of species
○ has been accelerated by the activities of people.
○ will not be a problem in the coming century.
○ is a problem limited to the tropics.
○ is a problem only where topsoil and groundwater are limited.

Explanation:

Human activities such as deforestation, pollution, and over - hunting have sped up species extinction. It is a global issue, not limited to the tropics or areas with limited topsoil and groundwater, and will be a significant problem in the coming century.

Answer:

has been accelerated by the activities of people.