Which type of trees are primarily referred to as hardwoods?

Hardwoods are primarily referred to as broadleaf trees, which produce wide, flat leaves rather than needles. Broadleaf trees include species such as oak, maple, and hickory, which are significant sources of hardwood lumber.

Additionally, many hardwoods are deciduous, meaning they shed their leaves annually, particularly in temperate climates. This category encompasses a large variety of tree species that provide important ecological benefits, like habitat and food sources for wildlife.

When considering the two correct characteristics together as both broadleaf and deciduous, it highlights that most hardwood trees fall into these categories, thus reinforcing the choice that both broadleaf and deciduous trees are primarily referred to as hardwoods. Therefore, the answer embraces the broader definition encompassing all major aspects of hardwood trees.