Your question answered:

Should we eat only organic fruit and vegetables?

Eating organic is a good idea for a few reasons.  The most obvious of which is that they don't have all the chemicals and pesticides on them.  These chemicals can build up in your body and cause harm.  Some experts would argue organic tastes better and contains more nutrients too.  This can be because of the quality of the soil and the farming methods.

If you don't have access to organic veggies and fruit or you feel they are out of your price range, then buy food as fresh as possible, local and in season and rinse it in water with a tablespoon of apple cider vinegar, this can help to remove some of the pesticides from the skin of the fruit or vegetables. 

It is especially a good idea to eat organic meat if you can, otherwise from supermarkets choose free range, kangaroo and ocean fish.     

If you have any further questions please contact me.