In illustration D039NG below, what type of cloud is indicated by the number one?

Correct Answer: Option A — Cirrus

Cirrus clouds are high-altitude, wispy, hair-like clouds composed of ice crystals. They typically appear at altitudes above 20,000 feet. In standard meteorological cloud identification charts, such as those referenced in Bowditch, these distinct, delicate formations are categorized as Cirrus, often signaling a change in weather patterns.