Einstein was against which kind of weapons?

Correct answer: Nuclear weapons

Einstein opposed nuclear weapons and warned about the destructive consequences of nuclear war. His scientific work helped humanity understand the energy contained in matter, but he did not support using that knowledge to destroy civilian life. He became an advocate of peace, international cooperation and responsible control of dangerous weapons. Wooden toys, farm tools and musical instruments are not weapons and therefore cannot fit the historical idea in the question. Option A is correct because it reflects the chapter’s theme of combining scientific responsibility with concern for world peace.