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 am hesitating between 4 options to answer the following question, which option should I choose?
Question: Why would explorers use a compass when traveling to unknown lands?
Possibilities:
- 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

to locate a direction to travel