Answer:
Mr. Winter knows Harriet to be mature for her age, so he asks Harriet to take the unusual babysitting job to calm his wife's concerns.
It is a simile because it is a figure of speech involving the comparison of one thing with another thing of a different kind, used to make a description more emphatic or vivid.
.org and .edu are the most credible .gov isn’t the best for every subject
" she finished the Sprint with the speed of a cheetah ." is matallingual language
