Carol and Sam were using the microscope in science class. They used a dropper to put some pond water on their microscope slide. This is what they saw. "That is something living," said Sam. "I don't think so," said Carol. What do you think? Explain. options:

This is not alive. It is not moving or responding.

This sample is made of identical units. It is not alive.

This is a multicellular organism made of cells. It is living.

This may have been alive once, but not now because it is not moving.