Which of the following is not a natural cause of climatic change? a. solar activity b. human activity c. volcanic activity d. earth's tilt any ?

The correct answer is B. Human activity. That's why it is said that global warming si not natural because it's human created. This usually means that things like deforestation or usage of fossil fuels or freon or similar things brings climactic change, usually for the worse. Other mentioned aspects are all found in nature and are not something that we can affect.

Ais the correct answer

Idon't know how to do this but maybe ask your mom or dad