-Increased vacuolation, cell enlargement, and new cell wall deposition are the characteristics of cells in phase of growth
A) Meristematic
B) Elongation
C) Maturation
D) Differentiation

Hint:Growth is a fundamental property that is common for both plants and animals. Though the stages and properties of plant growth varies from animal growth.

Complete answer:
The growth in plants is said to be indeterminate, which means that plants have the inherent property of growing throughout their lives. This property is due to the presence of a particular type of tissue called the meristematic tissue and this type of growth is also known as the open form of growth. The phases of plant growth are- meristematic phase, elongation phase, maturation phase and differentiation.

>Meristematic phase is where there is constant division of cells and rapid formation of roots and shoots.
>Elongation phase is where there is enlargement of cells, increased vacuole formation and also new cell wall deposition.
>Maturation phase is where protoplasm as well as cell wall thickening have attained maximum growth.
>Differentiation is when cells start taking up specialised functions and stop dividing. The growth rate can either be arithmetic or geometric both of which have different shapes of the curves.

Hence the correct answer is option (B) Elongation.

Note:Growth in plants is brought about by environmental conditions such as water, oxygen, nutrients, light, temperature as well as by plant growth regulators that can either enhance the growth rate or inhibit the growth rate. Growth promoters include auxin, gibberellin and cytokinin whereas inhibitors include abscisic acid and ethylene.