Speaking by Description
To describe is to draw up a picture or a scene in the mind of the listeners. To describe is to visualize something in the form of objects or otherwise. If you were to ask to describe a flower, you might go about explaining the smell of it, the color texture or the memory you have had attached with it. But if you were to explain its physical structure or its biological components, it would be exposition.
Decide on the beginning on which particular point of view you wish to describe, because the way to describe the fish in the ocean is very much different from the ocean of fish. To describe is to visualize but which approach will you be taking? To visualize it yourself with a pessimistic approach would only make a bright-shinning day cloudy.
Never explain beyond what is necessary, if it’s too detailed would only make your speech sounds too technical and that would be exposition instead. Always cut out all ideas that are not necessary to produce the effect you wanted, as said before, always determine beforehand which point of view you would like to take; fish in the ocean or the ocean of fish, for you can’t see both sides all at once.
In speaking by description, try to use lots of adjectives, anything less would make your speech appear to be dull or uninteresting.