Select the most appropriate option to fill in the blank.
"Changes observed in Earth's climate since the early 20th century are ______ driven by human activities, particularly fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere, raising Earth's average surface temperature."
- Aoverall
- Bpractically
- Cprimitively
- Dprimarily
Solution & Step-by-step Explanation
The sentence discusses the major or chief cause of modern climate change.
Primarily means chiefly, principally, or mainly. It perfectly fits the context to show that human activities are the main driver.
Overall: Taken as a whole.
Practically: Virtually or almost.
Primitively: In a regular, simple, or old-fashioned manner.
Primarily means chiefly, principally, or mainly. It perfectly fits the context to show that human activities are the main driver.
Overall: Taken as a whole.
Practically: Virtually or almost.
Primitively: In a regular, simple, or old-fashioned manner.