Bicyclist riding on a grass field , wearing a red and yellow uniform , shades , and a helmet .
It is probable that the man is practicing riding his bike on grass to prepare for a competition .
It is probable that the man is practicing riding his bike on grass to prepare for a competition .
It is unlikely that the man is practicing riding his bike on grass to prepare for a competition .
The man is practicing riding his bike on grass to prepare for a competition .