Answered

What is the oldest and most stable part of a continent?

ACrust
BPluton
CCraton
DShield User: A substance that enters Earth's cycles and does harm to living things is
Aoxygen.
Bhydrogen.
Ca pollutant.
Dfreshwater. User: The Cenozoic Era is also referred to as the
AAge of Mammals.
BAge of Fish.
CFirst Era.
DAge of Dinosaurs

Verified Answer :

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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