Seasonal changes: The seasonal changes are, for example, a plant grows in spring, the fruit ripes in summer, and the trees dropping leaves in autumn, this happens depending on many factors such as temperature, luminosity or the lenght of day and lenght of night. We can differentiate it between long-day plants and short.day plants. The long-day plants are plants that need more exposure of sunlight for flowering, like oats or orange trees, or short.day plants that they need more exposure to darkness for flowering, like soy or rice.