The answer is A. Twigs : Nest.
In the other three pairs, the first word is a material that is used to make the second word. Wood is used to make furniture, clay is used to make pottery, and gold is used to make ornaments. However, twigs are not used to make nests. Birds build nests out of a variety of materials, including twigs, but twigs are not essential for nest construction. In fact, some birds build their nests entirely out of mud or grass.
Here are some additional details about each pair:
A. Twigs : Nest
Twigs are small branches or pieces of wood that are often used in nest construction. Birds may use twigs to build a foundation for their nest, or they may use them to create a platform or lining for the nest.
B. Wood : Furniture
Wood is a natural material that is often used to make furniture. Wood can be used to make a variety of furniture, including tables, chairs, beds, and dressers.
C. Pitcher : Pottery
A pitcher is a type of pottery that is used to hold liquids. Pitchers can be made from a variety of materials, including clay, glass, and metal.
D. Gold : Ornaments
Gold is a precious metal that is often used to make ornaments. Gold can be used to make a variety of ornaments, including necklaces, earrings, and bracelets.