What is the easiest tool to cut bolts or steel rods?

When considering tools for cutting bolts or steel rods, the best option is typically a tool designed to handle tougher materials, such as a bolt cutter. Bolt cutters are specifically made for this purpose and can easily shear through the hard steel of bolts and rods due to their strong jaws and leverage mechanism.

The other options likely represent tools that are less suitable or effective for cutting through tough steel materials. For example, a hacksaw might require more effort and time, while a regular pair of pliers would not provide the necessary cutting power for thick steel. Thus, the choice that best matches the requirement of cutting bolts or steel rods without excessive labor or difficulty is the one designated as the easiest, which aligns with the functions of a bolt cutter.