Final answer:
Mortar is the binding resource widely used to hold masonry units together.
Step-by-step explanation:
The binding resource that is widely used to hold masonry units together is mortar. Mortar is a mixture of cement, sand, and water that acts as the adhesive between masonry units, such as bricks or stones, in construction. It helps to strengthen the structure and provide stability by creating a bond between the units.
Learn more about masonry unit bonding