As daylight arrived, what additional threat did Brian face?

• A. He found shelter and rested.
• B. Mosquitos were killing him.
• C. A rescue helicopter landed nearby.
• D. A pack of dogs approached.

Answer: (B)

The main idea being tested is how daylight changes the dangers Brian faces in the wilderness. When dawn arrives, he’s not just dealing with cold, hunger, and the need for fire and shelter—he also confronts a relentless insect threat. Mosquitoes swarm in the daylight, feeding on him and draining his already limited energy. The constant bites, itching, and potential for infection make it hard to rest, stay focused, or move efficiently, which are crucial for his survival tasks like finding water, building shelter, and keeping track of his food and fire. This insect nuisance is described as overwhelming him, which is why it fits as the most significant new danger at daybreak. The other options would represent relief or danger that isn’t what the scene emphasizes at daylight—finding shelter and resting would help him, a rescue helicopter would be a fortunate event, and a pack of dogs isn’t a described threat in this moment.