Where do we get energy?

Primary energy sources include fossil fuels (petroleum, natural gas, and coal), nuclear energy, and renewable sources of energy. Electricity is a secondary energy source that is generated (produced) from primary energy sources.

Explanation:

hope this helps

Primary energy sources include fossil fuels (petroleum, natural gas, and coal), nuclear energy, and renewable sources of energy. Electricity is a secondary energy source that is generated (produced) from primary energy sources.

Explanation:

tissue

explanation:

it is actually formed by geoup of cells which is tissue

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;