Fact 1: The color of leaves on deciduous trees usually changes in the autumn season. Fact 2: Fall colors begin as deciduous trees lose their leaves. Given the two facts above, answer the question "Fall begins as deciduous trees lose their leaves when?" with the following options: - It becomes dormant - Plant growth is reduced - in the autumn season - deforestation - Physical weathering - in the winter season - in the spring season - in the freezing season
A:
in the autumn season