Which of the following tools is commonly used for finishing concrete surfaces?

The trowel is a crucial tool for finishing concrete surfaces because it is specifically designed to provide a smooth, even finish. When concrete is poured, it often requires additional work to achieve the desired texture and level of finish. The trowel allows the finisher to manipulate the surface of the concrete by smoothing and leveling it while it's still in a workable state.

Different types of trowels, such as hand trowels and power trowels, help in achieving various finishes and textures, making it versatile for applications ranging from simple flat surfaces to more decorative finishes. The proper use of a trowel is essential in ensuring that the final surface is not only aesthetically pleasing but also functional and durable, as a well-finished surface can help reduce wear and enhance the longevity of the concrete.

In contrast, tools such as a hammer and a saw are typically utilized for cutting or breaking concrete, and a shovel is more suited for moving or mixing materials rather than finishing surfaces.