Canadian social studies (no links)

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

Eter lives in a beautiful region. peter and other residents of his region use water from the river that flows through their region. recently, mark industries decided to set up their chemical plant near that river. peter realized that the waste from the chemical plant would pollute the river. he decided to seek a legal ordinance that would restrict the use of land near that river for specific use only. which type of zoning will peter and his region?

Which of the following events most directly contributed to the establishment of israel as a nation