Your body tells your brain that your foot hurts. Hope this helps
I think its 20, we briefly covered this in class
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All the factors listed, that is population density, temperature, carrying capacity, rainfall and sunlight all effect the living conditions of organisms in a biome as well as the type of species that will be found there.
Organisms that live in water are not totally independent of soil as a resource. These organisms depend on aquatic plants for food and other substances. These aquatic plants in turn require minerals for their sustenance. These minerals are carried to waterbodies from soil by rivers, rainwater etc.
1.) Charring a Marshmallow
2.) I think its B