Question

what is a carbon sink’s role in the environment?
a. reflecting sunlight to lower heat
b. absorbing excess carbon dioxide in the air
c. reducing water salinity in oceans
d. emitting stored greenhouse gases
what effect do feedback loops have on climate change?
a. accelerate warming effects significantly
b. slow down global warming rates
c. stabilize atmospheric temperatures
d. decrease overall polar ice cover

Explanation:

First Question (Carbon Sink's Role)

A carbon sink is a reservoir that absorbs more carbon than it releases. Option a is incorrect as reflecting sunlight is not a carbon sink's role. Option c is about water salinity, unrelated. Option d is the opposite of a sink (sinks absorb, not emit). Option b matches the definition of a carbon sink absorbing excess CO₂.

Positive feedback loops in climate change (e.g., melting ice reducing albedo, leading to more warming) accelerate warming. Option b is wrong as they don't slow warming. Option c is wrong as they destabilize temperatures. Option d is an effect of warming, not feedback loops' direct effect. Option a is correct as feedback loops (especially positive) amplify warming.

Answer:

b. Absorbing excess carbon dioxide in the air

Second Question (Feedback Loops on Climate Change)