\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Which transformation matches the description?
  1. "A mirror image across a line." \(\rightarrow\) .
  2. "Turning around a fixed point." \(\rightarrow\) .
  3. "Sliding in a straight line." \(\rightarrow\) .
  4. "Resizing (enlarging or reducing)." \(\rightarrow\) .