Which aspect is central to Impressionism?

The focus on capturing light and atmospheric effects is central to Impressionism because the movement emerged as a reaction against the formal techniques and strict compositions of earlier art styles. Impressionists sought to convey the fleeting qualities of light, color, and atmosphere in their works, often painting en plein air (outdoors) to observe natural light and its effects on the landscape.

This goal is exemplified in the loose brushwork and lighter palettes typical of Impressionist paintings, which reflect the transitory moments of everyday life and the effects of sunlight. Artists such as Claude Monet and Pierre-Auguste Renoir are known for their innovative use of color and light to create vibrant, dynamic scenes. They aimed to capture not just what they saw, but also the sensations and impressions that the moment evoked, aligning perfectly with the ideals of the Impressionist movement.

The other options do not accurately reflect the spirit of Impressionism. For instance, precision of detail and rigid composition signify a more traditional and academic approach to art rather than the spontaneous and expressive style of the Impressionists.