Blood and ferogs in Egypt

  

Q: Why did God  made  the river turn to blood?   

 A: God turned the Nile River into blood as a judgment against the Pharaoh for refusing to free the enslaved Israelites.  

Q:  Why did God  take away the frogs?  

 A: God did not take away the frogs because they were a  plague but rather as the second of the ten plagues on Egypt God removed them after Pharaoh agreed to let  the Israelites go.