Answer:
"Can you believe what we just saw?"
"As they moved further down the walkway, the light became dimmer, and eventually they could not see anything around them"
Explanation:
This shows that the boys were amazed to discover an ancient cavern, creating a sense of mystery and awe in the passage.
My best bet would to go with 'were' because they sound similar and it just seems more professional.
<span>a roundup of cattle so farmers can brand them and stuff like that</span>