Science Assertion (A) & Reason (B) MCQ

Over the past century, the burning of fossil fuels and other human and natural activities have released enormous amounts of heat - trapping gases into the atmosphere.
These emissions have caused the Earth's surface temperature to rise and the oceans absorb about 80 per cent of this additional heat.
The rise in sea levels is linked to three primary factors, all induced by this ongoing global climate change.
One of them is the melting of glaciers and polar ice caps.
Large ice formations, like glaciers and the polar ice caps, naturally melt back a bit each summer.
But in the winter, snows, made primarily from evaporated seawater, are generally sufficient to balance out the melting.
Recently, though persistently higher temperatures caused by global warming have led to greater - than - average summer melting as well as diminished snowfall due to later winters and earlier springs.

The addition and release of any undesirable substance or material to any water body result in polluting the same. Waste contamination and toxicity are the common causes of water pollution that spreads from one location to the other with more and more contamination flowing in the water as human-made produced wastes.