Please answer number 9!

3. lithuania, latvia, and estonia all signed a peace treaty with germany in 1996 signed a pact with russia in 1996 were admitted to the european union in 2004 were damaged by the chernobyl explosion in 1986

Identify the type of chemical reaction involved in each action.

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.