A negative charge that exists because of a covalent bond with hydrogen.
They are the energy base of the food chain for all aquatic organisms, without them all aquatic organisms would most likely parish.
Abiotic factors are factors that include non-living parts of the environment which could be significant or essential to living organisms. Water is a non-living environment and it helps in giving life to plants and other organisms. Thus deemed abiotic.
Heat is generated by friction is one of the ways and fuel and air if making flames
