Two questions which arises in my mind about aurora borealis are:
- Why does aurora borealis occur?
- Why does aurora borealis occur in a particular time of the year?
Answers:
- As solar wind approaches the Earth, it meets the Earth's magnetic field. In the ionosphere, the ions of the solar wind collide with atoms of oxygen and nitrogen from the Earth's atmosphere. The energy released during these collisions causes aurora borealis.
- Aurora borealis is active the whole year. Since it needs to be dark in order to see aurora borealis in the sky, late August/September through the very beginning of April is the best time to go to a destination located in the aurora zone for a chance to see them.
Note: These are the questions which arises in my mind only. It may differ from person to person.
Hope you could understand.
If you have any query, feel free to ask.
I think its B but possibly C
Answer:
an agreement between countries covering particular matters, especially one less formal than a treaty.
Explanation:
Answer:
La géographie humaine ou anthropogéographie est la branche de la géographie qui étudie les personnes et leurs communautés, leurs cultures, leurs économies et leurs interactions avec l'environnement en étudiant leurs relations avec et à travers l'espace et le lieu.
