Question

question 2
complete the paragraph.
use the drop - down arrow to choose the correct answer.
an example of positive feedback is damming rivers. this directly results in reduced local humidity, making local areas less supportive of plant growth.
question 3
which is an example of positive feedback in earths climate system?
increasing local soil moisture, promoting lush vegetation
rising plant growth, reducing atmospheric co₂ levels
reducing earths albedo, accelerating further ice melt

Explanation:

Positive - feedback in the Earth's climate system is a process where an initial change leads to a further increase in the same direction. Reducing Earth's albedo (reflectivity) by melting ice exposes darker surfaces that absorb more heat, accelerating further ice - melt. This is a positive - feedback loop. Damming rivers is not a typical example of positive feedback in the climate system as described. Rising plant growth reducing CO₂ levels is a negative - feedback mechanism for climate change as it mitigates the greenhouse effect. Increasing local soil moisture promoting vegetation is a local ecological process not a classic climate - system positive feedback.

Answer:

reducing Earth's albedo, accelerating further ice melt