How is title is written when testing in chorophyl​

Chlorophyll (also chlorophyl) is any of several related green pigments found in the mesosomes of cyanobacteria and in the chloroplasts of algae and plants.[2] Its name is derived from the Greek words χλωρός, khloros ("pale green") and φύλλον, phyllon ("leaf").[3] Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.