Any lawyer anons?

Got an email from my childs' school:

"Today a flyer went home inviting all families to respond to a survey from the PTSA’s Diversity Equity and Inclusion coalition. The survey is short and the group is hoping to have all Geiger families respond.

I am writing to you because in our most recent school climate survey, we received a disproportionately large number of responses from families who identified as Caucasian. Your family identified your child as another racial identity than Caucasian, and I am hoping that you will engage in this survey to help the DEI group reach a fuller expression of our community’s perspectives. Thank you for considering this request.

To take the survey, you can simply click this link and follow the directions. It should take fewer than five minutes. If you take it here, you can disregard the flyer that came home with your child.

Thank you very much for sharing your perspectives!"

How is this even legal?