Which of the following is only source of energy which keeps natural ecosystems in a actual state?

Answer: Option A

Nuclear power is only source of energy that keeps natural ecosystems in an actual state.
Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Nuclear energy produces electricity that can be used to power homes, schools, businesses and hospitals.
Being a low-carbon energy source with relatively little land-use requirements, nuclear energy can have a positive environmental impact.