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>
a good environment could mean better people better love and kindness bad environment could mean problems in your future and/or daily life this can affect everybody and anybody
Isotonic solution This is a solution in which there is no net movement of water into our out of the cell when a cell is placed in this solution. The solution is also dilute.