Because the user can draw directly to the screen, light pens are used by graphics artists, though they are not as accurate as digitizing tablets. The pen works with CRT monitors but is not as compatible with projectors, LCD screens and other display devices.
THE DEFINITION OF NUTRIENTS. The definition of nutrients is a substance that provides nourishment for growth or metabolism. Plants absorb nutrients mostly from the soil in the form of minerals and other inorganic compounds and animals obtain nutrients from ingested foods. THE SIX ESSENTIAL NUTRIENTS PEOPLE NEED.
food (usually uncountable, plural foods) ( 1 uncountable) Any substance that can be consumed by living organisms, especially by eating, in order to sustain life. ( 2 countable) A foodstuff. ( 3 uncountable, figuratively) Anything that nourishes or sustains.