Answer:
the burning of tropical rainforests
Explanation:
The option that led to the rapid increase in carbon dioxide concentration in the atmosphere from the choices provided is:
- **the burning of tropical rainforests**
The burning of tropical rainforests releases significant amounts of carbon dioxide as trees that store carbon are burned. This contributes to higher levels of atmospheric carbon dioxide, which is a major driver of climate change. The other options listed generally are associated with reducing carbon emissions or do not significantly contribute to increased carbon dioxide levels.
