Answer :
In "My Father's Song" by Simon Ortiz, the mice serve as a symbol for the next generation of children. The option "They represent the next generation of children and suggest the need for protection." is the correct option.
The answer is clear from the following lines of the poem :
"Very gently, he scooped tiny pink animals
into the palm of his hand
and told me to touch them.
We took them to the edge
of the field and put them in the shade
of a sand moist clod."