Identify the true statement.
a. a. the antarctic ice sheet has been calving off huge icebergs over the last few decades.
b. regions covered by glacial ice are termed periglacial environments. c. the expansion of ice sheets at the end of the pleistocene caused a glacial rebound in northern canada.
d. glaciers move by basal sliding as friction between the ice and its substrate increases.

Option (A)

Explanation:

Antarctica is a southern continent mainly covered with ice. A large amount of ice has been accumulated in this region in the geological past, but over the last few decades, the icebergs of this region are continuously affected due to the rapid increase in global industrialization. These increasing industries are responsible for the emission of a large amount of toxic gases such as carbon dioxide, methane, hydrogen sulfate. Due to this rapid increase in the amount of carbon in the atmosphere, the global temperature of the earth simultaneously increased, resulting in the melting of the ice-bergs at Antarctica.

Thus, the correct statement is option (A).