to locate a direction to travel to measure the quality of drinking water to protect themselves from wild animals to determine levels of humanity in tropical areas
I gave my students this multiple choice question: Why would explorers use a compass when traveling to unknown lands?

Only one answer is correct among these 4 choices:
- to locate a direction to travel
- to measure the quality of drinking water
- to protect themselves from wild animals
- to determine levels of humanity in tropical areas

Could you tell me which one is correct?

to locate a direction to travel