HOW WAS OIL FORMED? in 4 step plss

Explanation:

To form oil, the following steps have to happen: 1. Dead plankton - both phytoplankton and zooplankton - as well as algae and bacteria sink to the bottom of an ancient ocean and mix with inorganic, clay-like materials that enter these oceans from streams and rivers. This creates an organic-rich mud

i believe it would be c: tons.

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.