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What is the oldest and most stable part of a continent?
a. Crust
b. Pluton
c. Craton
d. Shield User: A substance that enters Earth's cycles and does harm to living things is
a. oxygen.
b. hydrogen.
c. a pollutant.
d. freshwater. User: The Cenozoic Era is also referred to as the
a. Age of Mammals.
b. Age of Fish.
c. First Era.
d. Age of Dinosaurs

Respuesta :

WorldlyGlass49
1. The oldest and most stable part of a continent is craton.
2. A substance that enters Earth's cycles and does harm to living things is a pollutant.
3. The Cenozoic Era is also referred to as the Age of Mammals. 

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