To find the least amount of travel per day for adult mountain lions in the given seasons, we'll compare the kilometers traveled by both females and males.
From the table:
- **Cold-dry season:**
- Females: 9.28 km/day
- Males: 15.81 km/day
- **Monsoon season:**
- Females: 12.64 km/day
- Males: 18.93 km/day
- **Hot-dry season:**
- Females: 12.48 km/day
- Males: 18.87 km/day
Now we need to determine the least amount of travel for both sexes:
- For females, the least amount is **9.28 km/day** in the **cold-dry season**.
- For males, the least amount is **15.81 km/day** in the **cold-dry season**.
So, both the females and the males traveled the least in the cold-dry season.
Based on this analysis, the correct choice is:
**(Choice B) the cold-dry season for both females and males.**