What are the different types of natural zones shown on the map, and what are their corresponding symbols?

Natural Zones and Symbols:

• Arctic and Antarctic deserts
• Tundra and forest-tundra
• Taiga
• Mixed and broadleaf forests
• Forest-steppe and steppe
• Semideserts and deserts
• Savannas, sparse forests, and shrublands
• Sclerophyllous evergreen forests and shrublands
• Periodic wet (including monsoon) forests
• Wet equatorial forests
• Areas of altitudinal zonation