Answer:
it presents an unanswered question
Explanation:
it's obvious because it says Then an adult voice said behind us: “What are you boys doing up here?” which is asking a question
Do u mean two genders as in male and female ?
The answer is b) Participle
Hope I helped.
(Brainliest would be greatly appreciated!)
It has many water ways to help it deliver goods by boat which is easier then other methods
