I'm trying to find out what the differences and similarities are between:

Impressionism
Neoclassicism
and
Abstract Expressionism

Examples of these arts are:
The Emperor Napoleon in His Study at the Tuileries by Jacques Louis David (Impressionism)

The Luncheon of the Boating Party by Pierre-Auguste Renoir (Neoclassicism)

Autumn Rhythm (Number 30) by Jackson Pollock (Abstract Expressionism)

1 answer

Have you tried Googling each of those terms -- Impressionism, Neoclassicism, and Abstract Expressionism?