Question

the introduced the idea that all people have natural rights, including life, liberty, and happiness. the guaranteed equal protection under the law, which expanded in schools and public spaces. meanwhile, the protects freedoms like speech and assembly, allowing people to express their ideas and gather peacefully.
:: declaration of independence
:: 14th amendment
:: equal opportunities
:: bill of rights

Explanation:

To solve the fill - in - the - blank for the first box (the one related to introducing natural rights), we know that the Declaration of Independence introduced the idea that all people have natural rights (including life, liberty, and happiness). For the second box (the one about guaranteeing equal protection under the law in schools and public spaces), the 14th Amendment guarantees equal protection under the law, which expanded equal opportunities in schools and public spaces. For the third box (the one about protecting freedoms like speech and assembly), the Bill of Rights protects freedoms like speech and assembly, allowing people to express their ideas and gather peacefully.

Answer:

First box: Declaration of Independence
Second box: 14th Amendment
Third box: Bill of Rights