A prototype<span> is an early sample, model, or release of a product built to test a </span>concept<span> or process or to act as a thing to be replicated or learned from. It is a term used in a variety of contexts, including semantics, design, electronics, and software programming.</span>
.com means company, so it is ran by a company.
<span>They leave a residue on the surface or inside the crop treated. </span>
D. It’s a sketch. That is, if you talking about, an art piece.