Which type of growth shows a rapid increase followed by a slow decrease to level off the population? exponential growth zero growth logistic growth dynamic growth

When a population is rapidly growing, but the growth slowly decreases over time this type of growth is called the logistic growth.
This type of growth occurs because the environment where the population lives become more and more ''saturated''. The availability of resources in the habitat limit the growth of the population and the growth slows down as the population approaches the carrying capacity of the environment.

Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.