Final answer:
Option (c) 'What does the spider look like?' necessitates an illustration for a clear understanding, as it requires visual representation of a component in the context of a derrick's movement in the field of physics.
Step-by-step explanation:
The question seeking to know which query can be answered only if an illustration is present, specifically in relation to guy wires and a derrick's movement, is most likely looking for a visual understanding of a concept related to physics, such as the mechanics of how forces and equilibrium principles apply to real-world structures.
When dealing with such a question, an illustration can help clarify complex concepts, such as the forces acting on a structure or the components like guy wires which stabilize the derrick.
In particular, the option (c) What does the spider look like? would most likely require an illustration for a clear answer, as it refers to a visual representation of the part known as a spider within the context of a derrick's movement.
Understanding the form and connections of a spider is critical for visualizing how it contributes to the stability and movement of a derrick