• bio-geographical regions
  • similar โคต๏ธ
    • climatic conditions
    • vegetation types
    • associated animals
    • association of plants & animals โžก๏ธ interaction of species

Example: - Noni Fruit of Brazil โคต๏ธ

  • found to be anti-cancerous
  • being cultivated in Andaman & Nicobar
    • due to similar climatic condn

Types

  • Hot deserts
  • Cold deserts
  • Tropical wet
  • Deciduous, etc