Answer:
The correct option is D) Number of microbes increases exponentially with time.
Step-by-step explanation:
As we can see from the graph, the population of the microbes is starting with a slow growth in the start but as time increases, the population starts to grow in an exponential manner. Exponential growth occurs when there is enough supply of food and other resources to support growth. But with the passage of time, the resources will start to decline and we will see a decline phase after the exponential phase has occurred.