Which of the following sentences from the excerpt employs the most vivid imagery
1. "we could begin to doze again, to rest, to "
2."crouching in her corner, her blank gaze fixed on some faraway place, she no longer saw us."
3."the heat, the thirst, the stench, the lack of air, were suffocating us."
4."at ten o' clock in the evening, we were all trying to find a position for a quick nap and soon we were dozing."