What natural resources are used to make the synthetic product?

Petroleum is a natural resources used to make synthetic product plastic.

Explanation:

Natural resources are materials that occurs in nature or without human activity which can be exploited to economic and human gain.

Synthetic products are material that are gotten from processed natural resources.

Synthetic product plastic is produced from petroleum , a natural resources that occur naturally on earth.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.