1. How did Wegener use the shapes of
the continents as evidence that the
continents had moved?

It looked like the continents fit together like puzzle pieces

Could I Maybee get brainlest if someone else answers?

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.