Concept:The harmattan is a dry, dusty wind that blows from the Sahara Desert across West Africa.
Explanation:This wind is common during the dry season.
It carries fine dust and sand particles from the desert.
As a result, the air becomes dry and hazy.
The humidity level drops very low.
Visibility may reduce due to suspended dust.
The harmattan is neither wet nor cold and humid.
Therefore, descriptions like wet and cold, dry cold and wet, or high relative humidity do not apply.
The most accurate description is that it is dry and dusty.
Answer:C. dry and dusty