Day one: Teacher will submerge one egg in Vinegar Solution overnight. One egg is left alone in the beaker labeled as the control egg. Why does an experiment need a control egg?

A scientific control is an experiment or observation designed to minimize the effects of variables other than the main or independent variable.

Explanation:

This increases the reliability of the results.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.