Question:easy

Given below is a pair of events I and II. You have to decide their nature of relationship. Assume that the given information is correct and final.

I. Sea level is steadily rising
II. Global Warming is a serious problem which the world is facing

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Think of one as the disease and the other as its symptom. Melting ice and the expansion of warm water are what push the sea up.
Updated On: Jul 17, 2026
  • I is the main cause and II is the main effect
  • I is effect but II is not the main cause
  • II is the main cause and I is the main effect
  • II is an effect but I is not the main cause
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The Correct Option is C

Solution and Explanation

Settle this pair by asking which event is the broad condition and which is one symptom of it. Global warming is a whole planetary process. A rising sea level is one measurable sign of that process, sitting alongside other signs like retreating glaciers, shifting seasons and harsher heat waves. A single symptom cannot produce the condition that generates it.

  1. I is the main cause and II is the main effect: For this to hold, water climbing a few millimetres a year would have to warm the whole atmosphere. There is no such mechanism. Sea level is a reading taken off the planet's thermometer, not the thermometer's fuel.
  2. I is effect but II is not the main cause: The first half is right, since the sea rise is clearly an outcome. The second half is indefensible. Two well established routes tie warming to sea level. Ice sheets and mountain glaciers melt and pour extra water into the oceans, and the sea water itself expands as it gets warmer, taking up more room in the same basin. Both routes are direct consequences of a warmer planet, so global warming is very much the main cause.
  3. II is the main cause and I is the main effect: Greenhouse gases trap heat, the average temperature climbs, land ice melts and drains into the ocean while the ocean water expands, and the mean sea level goes up steadily. That chain runs cleanly from II to I with no gaps, and it is the reason coastal countries treat sea level as a warming indicator.
  4. II is an effect but I is not the main cause: Calling global warming an effect within this pair leaves it without any cause, since the only other event on offer is the sea level rise, which cannot heat the planet.

So option (C) is correct: global warming is the cause and the steady rise in sea level is its effect.

Let's summarize:

  • A broad condition causes its symptoms, never the reverse.
  • Warming raises sea level through melting land ice and through thermal expansion of sea water.
  • Sea level is used worldwide as an indicator of warming, which confirms it is the effect.

The answer is option (C).

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