Lights give off energy in the form of thermal energy and
energy

Energy, or the ability to do work, can exist in many different forms. ... The stage lights use electrical energy and give off both light energy and thermal energy, commonly called heat.

Explanation:

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the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.