Which option gives a correct pair of climate factor and effect?

Correct answer: Altitude and decrease in temperature

The direct answer is A: altitude and decrease in temperature. A climate factor is a natural condition that influences climate, while an effect is the resulting change. Altitude is height above sea level, and temperature generally falls with increasing height, so this is a genuine cause-and-effect pair. Option A is correct. Option B is wrong because a rain gauge is an instrument for measuring rainfall, not a climate factor that produces maritime influence. Maritime influence is related to the moderating effect of nearby sea. Option C is wrong because language is a human cultural feature, not a standard physical climate factor causing humidity. Option D is wrong because a road is human-made infrastructure, whereas latitude is a climate factor; the pair does not show a valid relationship. The exact exam method is to check both parts: Is the first item a climate factor? Does it normally produce the stated effect? Only A passes both checks. Memory cue: altitude up, temperature down.