Seasons and Weather:

There are four seasons in a year: summer, autumn, winter, and spring. Each season has its own distinct characteristics and weather patterns. In this question, we are asked to identify the season that is usually cold and requires us to wear warm clothes like sweaters and coats.

Winter:

Winter is the season that is typically associated with cold weather and the need for warm clothing. It is the coldest season of the year and is characterized by low temperatures, shorter days, and longer nights. Winter occurs after autumn and before spring.

Key Characteristics of Winter:

- Cold temperatures: Winter is known for its chilly weather, with temperatures often dropping below freezing point. It is common to experience frost and even snowfall during this season.
- Shorter days and longer nights: In winter, the days are shorter and the nights are longer due to the tilt of the Earth's axis. This results in less sunlight and contributes to the overall coldness of the season.
- Winter solstice: The winter solstice, which usually occurs on December 21st or 22nd, marks the shortest day and longest night of the year in the Northern Hemisphere. It is the point when the sun is at its lowest point in the sky.
- Seasonal activities: Winter is often associated with various activities such as building snowmen, ice skating, skiing, and enjoying winter sports.
- Warm clothing: Due to the cold temperatures, people typically wear warm clothing during winter. This includes sweaters, coats, scarves, hats, gloves, and boots to protect themselves from the cold.

Conclusion:

In summary, winter is the season that is usually cold and requires us to wear warm clothes like sweaters and coats. It is characterized by low temperatures, shorter days, longer nights, and often includes snowfall. So, option 'C', which is winter, is the correct answer to the question.