Which of the following particles is the fundamental unit of all matter, both living and nonliving?

a) neuron

b) electron

c) atom

d) cell

Cell.

Explanation:

Living organisms has the ability to show the properties that are necessary to maintain the life processes. The living organisms has the ability to grow, shows reproduction, respiration and excretion.

All the living are made up of cells. Cell is the structural and functional unit of the living organisms. The non living organisms doe not contain any cells in their structure.

Thus, the correct answer is option (d).