Biology

The correct answer is: D. The spread of a new virus in a population.

Explanation:

Exponential growth occurs when the rate of growth is proportional to the current size or quantity, causing the growth to accelerate over time. In real-life scenarios, exponential growth is commonly seen when there is reproduction or replication that happens at a constant rate over time, like in populations or viral infections.

Let’s break down the options:

A. The increase in the number of cars on the road: This is generally not exponential growth. While the number of cars on the road may increase over time, it's usually driven by factors like population growth, urbanization, and economic development, which can follow more of a linear or logistic growth pattern (not exponential).

B. The growth of a tree over time: Tree growth is typically more of a logistic growth model rather than exponential. While trees grow in size, they do not continue to grow faster as they get larger indefinitely...