21. Two factors which cause global climate change are listed below. Factor 1: Mountain building.
Factor 2: Changes in the amount of atmospheric gases.
Which of these statements is correct about the two factors which cause global climate change? (3 points)
Factor 2 is a natural factor and Factor 1 is influenced only by human factors.
O Factor 1 is a natural factor and Factor 2 is influenced only by human factors.
Factor 1 is a natural factor and Factor 2 may be influenced by both nature and human factors.
Factor 1 is a human induced factor and Factor 2 may be influenced by both nature and human factors.