Why does bacteria not cover the earth

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Answer ➜ Competition and lack of nutrition are probably the main reasons and according to Biologists, the reason Earth is not covered with bacteria is that conditions are not ripe for bacteria to develop.

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c. would be the answer : )

explanation:

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.