Final answer:
Steep topography, narrow gorges, and difficult environmental conditions such as extreme cold and low oxygen levels indicate a tough landscape to survive.
Step-by-step explanation:
The details from the map which indicate that this is a tough landscape to survive include aspects such as steep topography, presence of narrow gorges, and marshes and fens.
These physical features can make an area difficult to traverse due to the risk of avalanches, falling, or getting trapped. In addition, environmental conditions like extreme cold, low oxygen levels, and low barometric pressure, exemplified by environments such as Mount Everest, pose significant survival challenges. Trail maps with steep contours and narrow paths suggest difficult hiking conditions, while historical references to trail usage, like those during the westward migration and the resulting Pioneer Farmer's life, highlight the harshness of these landscapes.