Many people use microwave ovens to cook their food . which option is best described as an engineering endeavor related to microwave ovens? A- studying how microwaves are different from other forms of radiation
B- preforming experiments to determine how microwaves affect food nutrition
C- investigating questions about effects that the use of microwaves ovens has on human health
D- researching the way people use microwave ovens to determine how to improve their design

is C

Explanation:

Just did it on apex LOL

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper