<u>slumping</u>:<span>collapse
</span><span><u>mudslide :</u>Landslide high speed circulating a mixture of water, mud, silt <span>and clay
<u>avalanches</u> :</span></span><span>detachment and sliding of a large amount of snow along a mountain.</span>
Answer: Security Guard
Explanation: The security guard left last. You can see that this is true because the man and his dog's footprints are on top and the only prints that have not been disturbed by someone else.
Japan has a negative population growth
