One possible answer might be people - people get shorter the older they get.
It erodes, and becomes smoother, rounder, and shorter. Like people do.
Both, but in my expeirience, women tend to do so more often.
A panda bear's tail does not shorten as it gets older. However, the fur thickens around it and the bear grows much larger than its birth size, so it may appear shorter.
A candle. As it burns, it gets shorter in length but longer in wax height.
The answer is a candle because it is tall when it is new or 'young.' But as it gets used or 'older', it gets shorter because the wax melts.
they "shrink" when they get older :)
elevation
Children anywhere are shorter than adults.
altitude
altitude
elevation