Concept:
An orthophoto is an aerial photograph that has been orthorectified to remove distortions caused by camera tilt and terrain relief.
Step 1: Understand an orthophoto.
Orthophotos
• Have a uniform scale.
• Can be used like maps for accurate measurements.
• Are free from relief displacement and tilt distortions.
Step 2: Identify the distinguishing feature.
Hence,
\[
\boxed{\text{An orthophoto has uniform scale and is free from tilt and relief distortions}.}
\]
Therefore, the correct option is
\[
\boxed{(C).}
\]