1. Which of the following is not a natural cause of climatic change?
A. Earth's tilt
B. Solar activity
C. Human activity
D. Volcanic activity
I think it is C
Right.
To determine the correct answer, we need to understand what natural causes of climatic change are.
A. Earth's tilt: This refers to the tilt of the Earth's axis, which causes the seasons. It affects the distribution of sunlight and can lead to changes in climate patterns.
B. Solar activity: This refers to changes in the Sun's energy output, including variations in the intensity of solar radiation and the occurrence of solar flares, which can influence Earth's climate.
C. Human activity: This refers to the actions of humans, such as burning fossil fuels, deforestation, and industrial processes, which release greenhouse gases into the atmosphere. These greenhouse gases contribute to global warming and climate change.
D. Volcanic activity: Volcanic eruptions release large amounts of gases and particles into the atmosphere, which can temporarily alter climate patterns, causing short-term cooling effects.
Based on this information, we can conclude that the correct answer is D. Volcanic activity is a natural cause of climatic change, as it can have short-term effects on climate patterns. Human activity (option C) is not a natural cause, but rather an anthropogenic (human-caused) factor that influences climate change.