Africa’s Namib Desert features thousands of mysterious rings called what?

Here is the question :

AFRICA’S NAMIB DESERT FEATURES THOUSANDS OF MYSTERIOUS RINGS CALLED WHAT?

Here is the option for the question :

• Eternal spheres
• Fairy circles
• Patom craters
• Giant’s causeway

The Answer:

And, the answer for the the question is :

Explanation:

[STC0018212]. Unknown ‘fairy rings’ in the Namib Desert grasslands of southern Africa have perplexed geologists for years. The round, bare spots, which have a diameter of 10 to 65 feet, are surrounded by short grass. Over hundreds of kilometres of desert, thousands of these unexplained rings are spread out. According to a mythology from Namibia, the gods made them by carelessly leaving their enormous footsteps in the crimson earth.