Question

the orbit slide in london, england
the orbit in london, england, is the worlds tallest tube slide. it is as tall as a 25 - story building. from the base, which is the ground level, an elevator carries people up to the top.
what does base mean in this passage?
the bottom of something
the height of something
a structure with many floors
a place that people visit

Explanation:

In the context of the passage about the Orbit slide, "base" refers to the starting point from which the elevator takes people up. It's the foundational part (like the bottom or ground - level part) of the structure.

Answer:

the bottom of something