Aperture is controlled by 'diaphragm' in optics.
The correct option is A. The artist used oil and sand on canvas an element of art used in Pablo Picasso's Mandolin.
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What techniques did Picasso use?</h3>
Picasso's creative process led to abstract pieces that investigated form and organization. Picasso broke down his figures into geometric shapes and added texture to them with color and brushstrokes. He added layers to his paintings and cut up objects' contours with color.
Picasso is thought to have used a variety of types of utility-grade paint in some of his pieces some photographs show boat enamel on the artist's taboret, but the oil-based enamel Ripolin is the one that gets mentioned the most. In France, the word "ripolin" once came to refer to all enamel paints.
Learn more about Pablo Picasso here:
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Actually, there is more than one, as Brazil has a mix of cultures (Indigenous, European, African) and this mixture produced many new instruments.
One example is atabaque, which can produce a variety of sounds: from higher to lower (but not very high,) and it can produce sharp and more fluid, sustaining sounds, too.
It's a percussion instrument because the sound is produced as a result of striking something (and not for example of a flow of air)
