Select the most appropriate option to fill in blank number 2.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. profound.
- The word "profound" is the best fit because it conveys the significant and far-reaching impact of the changes occurring in the Earth's climate.
- It highlights the depth and seriousness of these changes, which are primarily caused by human activities.
- The other options, like "simple," "honest," and "hard," do not capture the magnitude or importance of the changes as effectively.