Which technique is used to convert a color image to a black and white image?

For her science class, elaine is creating a presentation on weather in the united states. she wants to make the presentation beautiful and interesting by drawing simple cloud or wave shapes. which is the best way for elaine to draw these shapes?

Ais a built in formula in spread spread a is any math process such as addition or subtraction. options are function and operation

Your is an example of personal information that you should keep private.