Which of the following is a pure substance

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

What substance has a mass of 9.5g and volume of 2.1cm^3

What state of matter is ice a. liquid b. element c. solid d. gas