The answer is a rainforest I’m pretty sure
Sicko
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I think its true because they are a soft solid that can be broken down into a liquid... Hope this helps in any way :3
The motivation behind why the vertical stature of the stairs is the main thing measured is that it uncovers to us how much gravity is up against the individual and their weight, so we require this data to decide how much vitality and power we have to get up the stairs.
