Explanation:
1. Oxygen, without oxygen no human can live, In space, there Is zero oxygen
2. Water, Astronauts will definitely need some sort of water since nearly every living thing requires It
National park's are meant to be a safe place for animals and nature where they can't be harmed or pursued for human use. The second question depends on your point of view but the natural environment does need to be protected.
https://4d4f.eu/content/nascarmartinsville-speedway-first-data-500-live-stream
Answer:
Proper cleanliness of water..
Answer: the main purpouse of physical maps usually show the most important political boundaries, such as state and country boundaries. So, this is true.
Explanation:
