Final answer:
The tundra is a climate that is too cold to support trees, agriculture, or grazing, but can support people that make a living fishing and whaling.
Step-by-step explanation:
The tundra climate is too cold to support trees, agriculture, or grazing but can sustain human communities relying on fishing and whaling due to its proximity to icy waters abundant with marine life. The tundra's harsh conditions, characterized by low temperatures and a short growing season, inhibit the growth of trees and large vegetation, making traditional agriculture unfeasible. However, the icy waters of the tundra regions provide ample opportunities for fishing and hunting marine mammals like whales, seals, and fish, forming the primary livelihood for communities inhabiting these areas. The barren landscape might seem inhospitable, but the maritime resources become crucial for the survival of indigenous peoples and others living in these regions, allowing them to adapt and thrive in an otherwise challenging environment.
The correct answer once again is: a) Tundra.