The process of growth is maximum during the Log phase.

Explanation:
The growth of microorganisms can be divided into four phases: Lag phase, Log phase, Stationary phase, and Death phase.

During the Lag phase, the microorganisms are adjusting to the new environment and preparing themselves for the growth. Therefore, the growth rate is slow, and there is no significant increase in the number of microorganisms.

During the Log phase, the microorganisms start to grow exponentially, and the growth rate is maximum. The cells divide rapidly, and there is a significant increase in the number of microorganisms.

During the Stationary phase, the growth rate slows down, and the number of microorganisms remains constant. The nutrients become depleted, and the waste products accumulate, which inhibits the growth of microorganisms.

During the Death phase, the number of microorganisms decreases due to the depletion of nutrients, accumulation of waste products, and other environmental factors.

Therefore, the process of growth is maximum during the Log phase, which is also known as the exponential phase. This phase is characterized by rapid cell division and exponential increase in the number of microorganisms.