Winter is a cold season and sometimes it's been much cold, Human body has a limitation to resistance from cold so to be warm and protect own self from coldness we have to wear warm clothes.

The British English term "trainer" derives from "training shoe". There is evidence that this usage of "trainer" originated as a genericised tradename for a make of training shoe made in 1968 by Gola.

No, You can't apply every human vitamin to a dog because some vitamins would be dangerous for dogs and their body system, Because some features of a dog's body and human body are different   it could be un-healthy for a dog. But lots of kind of vitamins are available for dogs.

All vitamins are organic including vitamin D. And minerals are not organic at all so I don't  think that Vitamin D is a mineral.

There is no scientific evidence to suggest that taking prenatal vitamins can help hair or nails grow longer, faster or stronger. It is true that it helps pregnant woman who need lots of vitamins and folic acid `for their child.

Vitamins encourage the body's normal growth, supply proper metabolism, ensure good health and protect against many diseases. Vitamins are needed for the body in small amounts for metabolism.

Sweet 16 parties should not be organised at anyone's home. It's best to choose another venue. Approximately the money  spend on each and every thing should be around £2500 for all. Individually it costs per head $200 because party dresses are very costly nowadays.

I think you can gives many things accord to your brother's interests which can surprise him, but if you are planning to give him some extra-ordinary, and if your brother is interested in riding,  you should choose a  mountain bike.