Question

1. what can disrupt the ocean conveyor belt?

a. solar radiation
b. melting polar ice
c. low barometric pressure
d. increased snowfall

Explanation:

The ocean conveyor belt (thermohaline circulation) is driven by differences in water density (salinity and temperature). Melting polar ice adds fresh water, reducing salinity and density of surface water, which can disrupt this circulation. Solar radiation drives the water cycle but doesn't directly disrupt the conveyor belt. Low barometric pressure affects weather, not the conveyor belt. Increased snowfall, unless it leads to ice melt affecting salinity, doesn't directly disrupt it. So melting polar ice is the main disruptor here.

Answer:

b. Melting polar ice