All layers are incredibly important. If we didn't, we would die very quickly and life would be inhabitable. The radiation from the son would kill us. The heat from the sun would dry up water and kill crops leaving us with no food/water.
Israel responded by what is termed here 'terrorist' tactics of the PLO in the 1970's by raiding PLO bases in neighboring Arab countries. It must be realized historically that Palestine used to belong to the Arab Palestinians ie it was their country and it was stolen by the British colonialists and sold to the rich Zionists for their so-called homeland. If the Israel govt really wanted to live in peace with the Palestinians and be slightly modest that they took away their country, then they wouldn't provoke them with settlements in the little land left that the Palestinians have on the Westbank and they would live in peace and harmony with them and Israel could have both Arabs and Jews living in harmony.
The Kennedy Space Center was first created for the moon missions. He wanted manned lunar launches. The program was announced on September 1, 1961. The first ever manned launch from the Kennedy Center happened on October 11, 1968. The correct answer is C.