The propaganda technique being use would be how it is biased. This is an opinion.
A. It represents the kindness and decency of the speaker's father, which the speaker admires.
So I don't know exactly how you want to start it or what exactly is is about, but I will give is a try.
Girls like pink and boys like Blue, Girls play with dolls and boys with cars. This is how society has always portrayed these two genders, creating a gender stereotype.
you can add a 3rd sentence and say
But can we break it? and then start your paper
again I don't know if this is good enough but I hope it helps.