Which of the following is a north-easterly wind from Sahara blowing towards the Gulf of Guinea?

The north-easterly wind from the Sahara blowing towards the Gulf of Guinea is called the "harmattan". This wind is a dry and dusty trade wind that blows from the Sahara Desert towards the western coast of Africa during the winter months (November to March). The harmattan is characterized by a hazy and dusty atmosphere, and it can cause low visibility and dryness in the affected areas. It is an important weather phenomenon in West Africa, and it has significant impacts on the environment, agriculture, and human health.