How do you think the change in chlorophyll levels is a response to changes in the lenght of day from summer to fall

Chlorophyll absorbs sunlight to be used in photosynthesis; therefore, a plant producing higher levels of chlorophyll during summer would be advantageous because it is able to absorb more sunlight when more is available. This means that it could potentially use photosynthesis to create more glucose, which the plant uses for functions such as growth.