details the differences between social classes.
The discovery of radioactivity closely followed the discovery of X-Rays. The X-Ray was accidentally invented by Wilhelm Conrad Röntgen in 1895. With the help of his wife, Röntgen tested his wife's hand and captured the bones in her hand and her wedding ring. It became the first röntgenogram and garnered attention from the public and the scientific community.
i know the last one is true but im not sure about the other ones
but the last one is a definite
Answer:
The use of iron tools helped in the spread of agriculture. The main crops cultivated were barley, wheat and rice. Beans and the oil seeds were grown. Various kinds of lentils were also produced. then People began leading a settled life and towns began to develop.
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