2. What does Pi think is the biggest threat as he is stranded on the
boat? How do you know?

Ithink the answer is c hope that works

Hold one let me think

The sentence needs a descriptor of exactly "what" will happen at gurley and marina. in this case, it is the light at the intersection turning green. in this case, the sentence could be rewritten as "the light at the intersection of gurley and montezuma will turn green exactly three seconds after the light at the intersection of gurley and marina."