Answer:
A day in Earth is perfectly timed in order for all natural processes in organisms to carry out and sustain life and also mutually support all living and non living things. The processes happening in one earth day causes interconnected chains and interdependent living. For example the timing and simultaneous occurrence of respiration and photosynthesis---this means the air composition is ideal for sustaining all organisms at any point of time during the 24hour period until the next cycle begins.