Answer:
[tex]\huge\boxed{\sf Hen's \ Egg}[/tex]
Explanation:
Seen with an unaided eye means that is visible to the naked eye.
So,
Hen's Egg can be seen with an unaided eye.
However, Red Blood Cells (RBCs) and Sperm cells need a microscope for them to be seen!
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807
