Pls help me with questions number 4

7. according to the theory of isostasy, which statement must be true? a. the asthenosphere is denser than the lithosphere. b. the asthenosphere has the same density as the lithosphere. c. the lithosphere has the same density as the core. d. the lithosphere is denser than the asthenosphere.

The current is like a stream or river in the ocean true or false

Which of the following best describes asbestosis?