Answer: The correct answer is-
A seed becoming a plant is an example that demonstrates growth of an organism due to mitosis.
Mitosis can be described as a type of cell division in which a parent cell divides and produces two daughter cells, having same number of chromosomes as their parent cell. It follows a series of stages that are prophase, metaphse, anaphase, telophase, and cytokinesis.
Mitosis allows the organisms to grow from a single cell into larger organism and it is significant in the repair of damaged tissues.
Thus, a seed becoming a plant correctly demonstrates growth of an organism as a result of mitosis.