Why did Iran attack Israel and how could Netanyahu strike back?

Matthew Savill, director of military sciences at the the Royal United Services Institute, said at the lower end of the spectrum Israel could strike Iranian military targets such as missile defence and radar sites inside Iran. This could include storage or operation sites for ballistic missile production...“Moving up the scale, ports or Iranian infrastructure, including oil production facilities, could be attacked to emphasise the damage that Israel can do to Iran. At the top end would be senior Iranian officials and the Iranian nuclear programme,” he said.