Explanation: The statement is true. Information is required to describe an object. It is also needed to explain processes involved in technical operations.

Explanation: Terms which involve principles, concepts or processes need to be defined. It is done so that ambiguities can be removed and information can be made available to others.

Explanation: A definition usually consists of one statement, though more than one statement might sometimes be necessary.

Explanation: A definition must contain: The class to which the term belongs and the thing which separates it from other members of the same class.

Explanation: The statement is true. A definition excludes everything which is unimportant, but without taking away anything from the main information that needs to be conveyed.

Explanation: While defining something a writer must eliminate his prejudices and limitations of knowledge in that field. He must give an objective and complete definition of a term.

Explanation: A drawing is a representation of an object drawn by lines, shade, etc..A picture is different from a drawing and an illustration.

Explanation: The correct statement is: A picture is a representation of an object on another surface. A drawing is a representation of an object drawn by lines, shade, etc.

Explanation: LASER stands for Light Amplification by Stimulated Emission of Radiation. It is a device which produces an intense, high direction beam of light of a very pure colour.

Explanation: The word thermostat is a combination of thermo = heat and stat = regulation. Thus thermostat is an automatic device for regulating temperatures.