Question

we may be in the middle of a sixth mass extinction event. what do scientists think is causing the current mass extinction on earth?
human activity such as habitat destruction
the slowing rotation and revolution of the earth
decreased sunlight from the sun

Explanation:

Scientists widely attribute the current mass - extinction to human activities like deforestation and urbanization which destroy habitats. Earth's rotation and revolution are stable, and there's no evidence of significant decreased sunlight causing the mass - extinction.

Answer:

human activity such as habitat destruction