Which of the following are considered the three types of reinforced concrete?

The answer is correct because the three types of reinforced concrete typically recognized in construction practices are rebar, welded wire reinforcement (WWR), and fiber.

Rebar, or reinforcing bar, is the most common type of reinforcement and is used to enhance the tensile strength of concrete, which is strong under compression but weak under tension. The addition of rebar helps prevent cracking and structural failure.

Welded wire reinforcement (WWR) consists of grids of steel wires that are welded together. This type of reinforcement provides uniform support and helps control cracking in larger concrete slabs.

Fiber reinforcement involves adding synthetic or natural fibers to the concrete mix. These fibers can help to control shrinkage, improve impact resistance, and enhance the overall durability of the concrete.

The other options don't accurately reflect the standard types of reinforced concrete used in construction. Wood, bricks, and concrete do not serve as reinforcements but rather as structural components on their own. While steel can refer to rebar, the presence of materials like wood or bricks does not pertain to reinforced concrete. Therefore, the proper classification of reinforced concrete is clearly represented in the accepted types mentioned in the correct answer.