Question

1. which factor most contributes to the melting of permafrost?

a. increased cloud cover
b. freezing rainfall
c. reduced sunlight
d. rising temperatures

Explanation:

Permafrost melting is mainly caused by temperature changes. Increased cloud cover (a) and reduced sunlight (c) would likely lower temperatures, not melt permafrost. Freezing rainfall (b) involves cold conditions. Rising temperatures (d) provide the heat needed to melt permafrost, aligning with climate change impacts on permafrost.

Answer:

d. Rising temperatures