Which of the following statements about human impact on trees is true? A. Human activity always has a negative impact on trees.
B. All human uses of trees require destruction of the trees.
C. Human activity has had both a positive and negative impact on trees.
D. Cutting down trees is the only activity that has a negative impact on trees.
The correct answer is C. Human activity has had both a positive and negative impact on trees.
Explanation: Human activity can have detrimental effects on trees, such as deforestation and habitat destruction, but it can also be positive, including reforestation efforts, planting trees for urban development, and conservation initiatives. Hence, the impact of human activity on trees is not exclusively negative.