Final answer:
Nails, screws, bolts, and rivets are objects made by hammering or pressing metal into their finished shapes, utilizing the advantageous properties of metal such as strength, malleability, and durability for construction and assembly.
Step-by-step explanation:
Objects that are made by hammering or pressing metal into a finished shape include nails, screws, bolts, and rivets. During the manufacturing process, these items are formed into their specific shapes to serve their unique functions in construction and assembly. Nails are generally used to fasten pieces of material together. They have a sharp point on one end and a flat head on the other, which allows them to be driven into the material with a hammer.
Screws are similar to nails but are designed to be twisted into material, creating a stronger hold due to their threaded shaft. Bolts are typically used with nuts to fasten materials together and require a hole to be pre-drilled. Rivets are used to permanently join two pieces of material together, commonly in metalwork and aircraft construction.
Metal is chosen for these items because of its strength, durability, and malleability. Under heat and pressure, metals like iron, steel, or aluminum can be shaped, which is why blacksmiths heat solid iron to form various objects. Each of these objects serves a specific and critical role in assembly, construction, and building due to the advantageous properties of metal.