Question

(1 point)
factories started manufacturing less goods
the volcanic activity on earth stayed constant
an ice age occurred and co2 was pulled from the atmosphere and stored in the ice
humans started burning more fossil fuels since the industrial revolution

Explanation:

To determine the correct answer, we analyze each option:

• "Factories started manufacturing less goods" would likely decrease CO₂ emissions, but the graph shows an increase, so this is incorrect.
• "The volcanic activity on Earth stayed constant" doesn't explain the increasing trend of CO₂ as volcanic activity is not the main driver of recent CO₂ increase.
• "An ice age occurred and CO₂ was pulled from the atmosphere and stored in the ice" would decrease atmospheric CO₂, conflicting with the upward trend.
• "Humans started burning more fossil fuels since the industrial revolution" is correct. Burning fossil fuels releases CO₂, and the industrial revolution led to increased fossil fuel use, which matches the rising atmospheric CO₂ concentration shown in the graph.

Answer:

D. Humans started burning more fossil fuels since the industrial revolution (assuming the last option is labeled D; adjust the label based on the actual numbering, but the text of the option is as stated)