The rate of growth of any organism follows

What is the process of increasing the number and mass of cells called?

After four successive mitotic divisions of a cell,in an arithmetic growth pattern,the total number of cells that have lost the ability of cell division is . . . . . . .

Assertion $(S)$: Growth occurs when anabolic processes exceed catabolic processes.
Reason $(R)$: Growth is the result of metabolism.
$(A)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(B)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(C)$ $S$ is true and $R$ is false.
$(D)$ $S$ is false and $R$ is true.

Define the term: Etiolated position.

After achieving its maximum,the growth decreases slowly during the phase of