Answer:
Mapping
Explanation:
Pilots usually use their knowledge of geography to read there maps
Explanation:
Sectarianism is a political or cultural conflict between two groups often related to the form of government they live under. ... Common examples of these divisions are denominations of a religion, ethnic identity, class, or region for citizens of a state and factions of a political movement.
Answer:
mountain systems and fresh water
Explanation:
mountain systems are a group of mountain ranges with similarity in form, structure, and alignment that have arisen from the same cause, usually an orogeny. Take the Himalayan mountains for example.
Fresh waters are natural occurring waters except seawater and brackish water. for example they have lake Baikal,the Yangtze river etc.
Nation states are difficult to create because of colonies ((tell me if u need to know why because I can help with that))
