Final answer:
The painting technique used is Impressionism, characterized by short, thick strokes of paint and vibrant, side-by-side color application.
Step-by-step explanation:
The artist has used a(n) Impressionist technique in this painting. Impressionism is characterized by its use of short, thick strokes of paint that aim to capture the essence of the subject rather than focusing on intricate detail. These strokes are typically applied side-by-side with minimal mixing, which allows the colors to appear more vivid due to simultaneous contrast. Impressionist artists tend to focus on the play of natural light and avoid the use of thin glazes, opting for a more opaque painting surface.