**Explanation:**

To determine which word stands out from the group, we need to analyze the characteristics and properties of each word and identify the word that is different or unrelated to the others. Let's examine each word:

a) **Orbit**: An orbit refers to the curved path followed by an object, such as a planet or satellite, as it revolves around another object due to gravitational attraction. Orbits are commonly associated with celestial bodies and space travel.

b) **Track**: A track can refer to various things, such as a path or course followed by someone or something, a railway line, or a song or piece of music. While the term "track" can have multiple meanings depending on the context, it is not necessarily related to space or celestial bodies.

c) **Space**: Space refers to the vast, seemingly infinite expanse that exists beyond the Earth's atmosphere and between celestial bodies. It is the area where all celestial objects, such as stars, planets, galaxies, and asteroids, exist. Space is directly related to orbits and is a significant concept in astronomy and space exploration.

d) **Road**: A road is a paved or unpaved route or pathway designed for vehicles, pedestrians, or animals to travel on. Roads are typically found on the Earth's surface and are used for transportation purposes. Unlike the other options, "road" is not related to space or celestial bodies.

Based on the analysis, option **C) space** stands out from the group because it is directly related to celestial bodies, orbits, and the vast expanse beyond the Earth's atmosphere, while the other options (orbit, track, and road) are not necessarily associated with space.