B. a popular student
C. a proud brother
D. a good communicator
He saw the squirrel slip off the branch.
B.
He saw the squirrel slip off of the branch.
The structure of a hammer, with its long handle and metal head, is designed to amplify force and deliver impactful strikes. This is an example of a core principle that structure is related to function.
The structure of a hammer is integral to its function. The hammer is composed of two main parts - the handle and the head. The long handle provides leverage, increasing the force that can be delivered to the head of the hammer. The metal head, particularly the flat hammer face, is hard and durable, thus designed to deliver an impactful strike without deforming itself. On the other side of the head, there is usually a claw that can be used to remove nails, showing how the form of specific parts of the hammer are tailored to their function. This idea that structure is related to function is a core principle found in many fields, including biology and engineering. For example, in biology, the structure of a bird's wing is related to its function of flight; likewise, the structure of a molecule in chemistry can greatly affect its function.
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