Can a cell be an organism?

btw this is science but it wasnt an option

Yes.

Explanation:

"A cell is the smallest unit of life and all living things are organisms" so a cell would be a organism. Organisms also consist of animals and plants which are built by cells. Cells are also called building blocks of life.

Hope this helps.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular