Answer:
Indeed, diamond is the hardest material in the world. Material hardness is a property determined by scratch resistance.
Explanation:
A substance can only be scratched by something of equal or greater hardness. Therefore, only a diamond can scratch another diamond. Hope this helps! :)
The theme is that ethnocentric hurdles are a problem Americans faced not only in the past, but still face today. Clifton and Dondre are not allowed to participate in major events with their peers due to the ethnocentric hurdles placed in front of them. For Clifton, this was not being allowed to go to an amusement park on his school trip. For Dondre, this was not being allowed to play in a golf tournament at a golf club that did not allow African Americans. Dondre and Clifton bonded over their shared experiences, and they and their classmates and teammates will be eternally bonded in their efforts to overcome the struggle of inequities that still rear up as the hideous face of hatred and discrimination.