NaCl (halite) or KCl (sylvite) is the correct answer.
They are basically checking if it's salty since these minerals are salts by their chemical components.
Answer:
A rainbow is an optical and meteorogical phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc.
Trees are important because they provide valuable commodities, including wood, paper, and fruit. However, forests are not distributed equally around Earth, and there are economic and social implications of some regions having more timber resources than others.
