The word driver is more general - anybody who drives a vehicle is a driver. You are a driver when you are driving your car. Some people work as bus drivers and taxi drivers (the drivers of trains are usually called conductors).
A chauffeur is a person who is employed to drive a car for a private individual. Rich people and celebrities often have chauffeurs so that they do not have to take public transportation, or drive themselves.
All chauffeurs are also drivers; not all drivers are chauffeurs.
Mushrooms are neither a fruit nor vegetable and therefore have unique nutritional characteristics. Mushrooms have a modest amount of vitamin B12. Mushrooms generate vitamin D when exposed to sunlight. There is no need to wash or peel a mushroom. Just brush off any residual compost. Mushrooms help lower the risk of gout. Mushroom consumption is associated with a lower risk of breast cancer. Mushrooms do not contain gluten.