People change their wardrobe with the seasons, grabbing a heavy coat in winter, while only wearing a light dress in summer. Animals, plants and the ecosystem cannot adjust their attire quite so easily, nevertheless they have evolved to making changes that help them survive seasonal conditions caused by the rotation of the Earth around the sun. There are four seasons of the year- winter, spring, summer and autumn, which can vary significantly in characteristics. In the summer, the temperature increases to the hottest. If they get too high, heat waves or droughts may cause trouble for people, animals and plants. In the spring, seeds take root and vegetation begins to grow. The weather in spring is warm and sometimes also wetter. Animals return from warmer climates, often with offspring. In the Autumn, temperatures cool again. Plants often grow dormant. Animals might prepare for the upcoming cold weather, storing food or moving to warmer regions. In winter, the temperature is cold. S...