Fill in the blank with correct option
Cells in our body have built-in ________ to divide and grow to optimum size.

Options

A. i) appliances
B. ii) mechanism
C. iii) approaches
D. iv) tools

Explanation

mechanism-a system of parts working together in a machine, a piece of machinery.
(a) appliances-a device or piece of equipment designed to perform a specific task.
(c) approaches-come near or nearer to (someone or something) in distance or time.
(d) tools-a device or implement, especially one held in the hand, used to carry out a particular function.