Final answer:
Red-orange, yellow-green, and blue-violet are examples of tertiary hues, which are made by mixing primary and secondary colors. Complementary colors are opposites on the color wheel, while analogous colors are side by side. The correct answer is a).
Step-by-step explanation:
Red-orange, yellow-green, and blue-violet are examples of intermediate or tertiary hues. These colors are obtained by mixing a primary color with a secondary color. For instance, red-orange is a mix of the primary color red and the secondary color orange. Similarly, yellow-green is a mix of the primary color yellow with the secondary color green, and blue-violet is a mix of the primary color blue with the secondary color violet.
Complementary colors are located opposite each other on the color wheel and stand out boldly when placed side by side. In contrast, analogous colors are next to one another on the color wheel, blending together smoothly. Tertiary colors are neither complementary nor analogous but are a further refinement of the color wheel.