temperature and sunlight
Some peoples' hair colour changes according to the weather. For example: In summer some peoples' hair colour goes lighter and leaves natural highlights behind.
Leaves on deciduous trees change colour in the Autumn prior to dropping.
leaves change their colour when there is a shortage of water in them and when the quantity of chlorophyll is decreased by shortage of water.
the weather
They change color because of the weather change in the fall
In Buffalo, New York, the leaves typically start to change color in mid to late September, reaching their peak in mid-October. Factors such as weather conditions and tree species can influence the exact timing of the color change.
Deciduous trees :)
Leaves in Kentucky and Tennessee typically start changing color in mid to late October, with peak color occurring towards the end of October and into early November. Factors such as weather and elevation can affect the timing of when leaves change color.
Temperature, sunlight, and moisture are the main weather factors that influence the colors of leaves in the fall. Cooler temperatures promote the production of red and purple pigments, while sunlight affects the intensity of colors. Moisture levels also play a role, as drought conditions can cause leaves to change color prematurely.
Not always. The weather and the temperature have a lot to do with it. If it stays warm they change later, if it gets cold sooner they change sooner.
Leave do no actuly change colour they die and rot away
cold weather and too hot weather