What are the three main categories of wood?

The correct answer identifies the three main categories of wood as softwood, hardwood, and manufactured board.

Softwoods come from coniferous trees, which typically have needles and cones, like pine and fir. These woods tend to grow faster and are generally less dense, making them more readily available and often less expensive than hardwoods.

Hardwoods originate from deciduous trees that shed their leaves annually, such as oak and maple. These woods are generally denser and more durable than softwoods, suitable for furniture and flooring due to their strength and appealing aesthetics.

Manufactured board refers to engineered wood products made by binding or fixing the strands, particles, fibers, or veneers together with adhesives or other methods. Examples include plywood, chipboard, and medium-density fiberboard (MDF). These boards are made from recycled materials and can be tailored for specific uses, presenting an efficient alternative to traditional timber.

The other options do not accurately categorize wood in a way that is recognized in wood classification. For instance, while regulated wood and synthetic wood may have specific contexts in environmental discussions or product applications, they do not represent main categories of wood as understood in woodworking and design.