Lead.
"Due to insufficient water treatment, lead leached from water pipes into the drinking water, exposing over 100,000 residents to elevated lead levels."
A mass movement is movements of masses of bodies of soil, bed rock, rock, debris, soil etc. which usually occur along steep-sided hills and mountains because of the pull of gravity
Answer: Skunk
Explanation: The panda will try to use their slow attack, but the skunk will counter it with their stinky spray that smells bad and the panda will run away.
