Altitude sickness occurs due to which of the following abiotic factor?

Which of the following statements are wrong regarding biodiversity ?
(i) Tropics harbor more species than temperate or polar areas
(ii) Terrestrial biodirersity increases from the equator to the poles
(iii) Patterm of biodiversity should not depend on latitude and species area relationship
(iv) Biodiversity exists not only at the species level but also at the lerels of biological organization
(v) Temperate regions are relatively more constant than that of the tropical regions