Final answer:
The relationship between installing windows and siding on a building is sequential (Option C).
Step-by-step explanation:
Installing windows and siding on a building involves a sequential relationship, where windows are typically installed before siding for better structural integrity and weatherproofing. This means that these tasks must be performed in a certain order to ensure the structural integrity and weatherproofing of the building. Typically, the window installation comes before the siding because the windows need to be properly flashed and sealed to prevent water infiltration; then, the siding is installed around the windows.
For example, it is common to install the windows first to ensure proper fitting and then proceed with the installation of the siding.
Thus, the correct option is C.