Final answer:
A light microscope is needed to see structures of frog eggs, HIV, and chloroplasts, but not ribosomes.
Step-by-step explanation:
In order to see the structures of frog eggs, HIV, and chloroplasts, a light microscope is needed. A light microscope uses visible light to observe specimens and is commonly used in schools. It can magnify objects and enable the user to see cells and their components. However, ribosomes are much smaller and cannot be seen with a light microscope.