1) a decrease in the amount of groundwater.
Answer:
mist our dew not sure i think mist
Explanation:
The body attacks particular foreign invaders and <span>immunity is adaptive.</span>
Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.
The Great Oxidation lasted 2.4 to 2.0 billion years ago.
Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.