Answer;
He worked to help Soviet Jews immigrate to Israel.
Explanation;
-A major contribution of Natan Sharansky was that he worked to help Soviet Jews immigrate to Israel.
-Natan Sharansky was an Israeli politician, human rights activist and author who, as a refusenik in the Soviet Union during the 1970s and 1980s, spent nine years in Soviet prisons. Through his efforts he helped the Soviet Jews to immigrate to Israel.
Differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
The answer is the first one
Americans were tired of war and the US should end it quickly.