Answer:
Step-by-step explanation:
The correct answer is (b) out of doors.
"En plein air" is a French term meaning "in the open air." When used in the context of art, it refers to the practice of painting outdoors, directly from nature. This technique allows artists to capture the effects of natural light and atmosphere more accurately than if they were working from memory or imagination. Rosa Bonheur was one of the first artists known to have painted in this style, making her an important figure in the history of plein air painting.