Cells is the answer because humans, plants ,and animals are made up of many cells that all perform a specific task in the body.
To prevent fatigue from affecting your driving, you should take regularly scheduled breaks such as every two hours or every 100 miles. The term fatigue explains that the driver is "sleepy,” “tired,” and "exhausted". Fatigue is one of the major reasons for accidents, because it can lead to impaired reaction time, judgment and vision and d<span>ecreased performance, vigilance and motivation.</span>
