I think is # 1 looking at the surface features of a virus. Isbecause #2 can see better than the naked eye, #3 because TEM microscope would kill them and #4 because is too small for the microscope.
<u><em>Electron microscopes are types of microscopes that uses a beam of electrons instead of light to magnify objects up to 500,000 times the actual size. These microscopes have a higher resolving power than the light microscopes since they use electrons.</em></u>
<em><u>There are two types of electron microscopes ; that is Scanning Electron Microscope and Transmission Electron Microscope. </u></em>
<em><u>Transmission electron microscope are used for studying internal structures of cells. In these microscopes electromagnets are used to magnify the image by passing a beam of electrons through a thin specimen.</u></em>
Algae are limited to restricted environmental and climactic zones. FALSE. Algae grow everywhere. The type of algae that grow is very specific to that location, depends on the climate and the temperature.