The Kamchatka Peninsula has 100 volcanoes.
Astronomers think planets formed from interstellar dust and gases that clumped together in a process called planetary accretion. The correct option among all the options given in the question is option "3". The word accretion actually means the formation of planets and other bodies that are created by the materials collected due to gravitational force.
Answer:
Colombo and Sri Jayawardenepura Kotte
Explanation: