Why is climate called long-term?

Correct answer: Because it is based on long-term averages

Weather describes atmospheric conditions at a particular time or over a short period, such as today’s temperature or rainfall. Climate is different: it describes the usual pattern of weather in a place, calculated from observations collected over a long period. This includes recurring patterns of temperature, rainfall, winds and seasons. Therefore, option D is correct because climate is based on long-term averages. The statements about one minute, one night or one event describe neither the normal meaning nor the time scale of climate.

To solve the question, distinguish short-term weather from long-term climate. A single rainy day is a weather event, but repeated records over many years can help show whether a place is generally wet, dry, hot or cold. Climate does not mean that every day has the same conditions; it means that long-term patterns and averages are studied. Since the defining feature is the use of observations over an extended period, the fourth option gives the correct explanation.