Explain why the standard deviation would likely not be a reliable measure of variability for a distribution

Question:

Explain why the standard deviation would likely not be a reliable measure of variability for a of data that includes at least one extreme outlier?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...