Hydrocarbons are compounds that contain(1) carbon, only(2) carbon and hydrogen, only(3) carbon, hydrogen, and oxygen, only(4) carbon, hydrogen, oxygen, and nitrogen, only24

Hydrocarbons are compounds formed by only hydrogen atoms and carbon.

Answer (2)

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Thermohaline circulation and gyres

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.