A flammable material made from plant and animal remains buried under layers of sediment found
near oil deposits. It is mostly comprised of
methane gas what is it ??

heat or electricity in the atmosphere- c.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

explanation:

a