What does the term "infinity" refer to?

The term "infinity" refers to the concept of unlimited extent, whether in time or space. When we talk about infinity, we are considering something that has no end or limit—an idea that goes beyond any measurable or quantifiable aspect of reality.

For example, in mathematics, infinity can represent quantities that are unbounded, like the numbers that continue increasing indefinitely. In philosophical contexts, infinity can relate to time that is endless or the universe's limitless nature. This perspective reinforces the idea of an endless continuum, which is captured effectively in choice B.

The other options are more about boundaries and limits, which stand in direct contrast to the essence of infinity. Finite space and defined boundaries imply a complete and measurable extent, while temporary limits suggest a return to a baseline or a measurable condition, which does not align with the concept of infinity.