2. The institutions gathered enough data for scientists to draw a conclusion about whether the annual global temperature is gradually increasing.
The data gathered by each institution is very similar to the data gathered by the other institutions.
Explanation:
The reflection of extra heat causes the sea ice to melt. This causes the sea ice to melt. This becomes a problem because the polar ice melts and contributes to the increase in the water content in the sea. This causes the rise in the sea levels.
The options (1) and (2) are correct because the institutions gathered enough data to reach plausible conclusions.
