Living things respond to their environment.
Living things breathe.
Living things must get rid of wastes.
Living things grow.
Living things need energy.
A complex organism.
A multicellular organism.
An intelligent organism.
An organism capable of reproducing.
She should turn the fine focus knob.
She should turn the coarse focus knob.
She should get glasses.
She should distance the eyepiece lens from the objective lens.