(a) Contour: Regions with identical heights above sea level ✅(b) Isotherms: Areas characterized by consistent temperature(c) Isohytes: Regions with uniform precipitation(d) Isobars: Zones with consistent atmospheric pressure levels

(a) Coniferous forest ✅(b) Broad-leaved forests(c) Deciduous forest(d) Littoral forests

(a) Isotherms ✅(b) Isohytes(c) Isomeres(d) Isobars

(a) Latitudes ✅(b) Longitudes(c) Meridians(d) Isobars

(a) India and China ✅(b) India and Pakistan(c) India and Burma(d) India and Nepal

(a) Nepal and Bangladesh(b) Bangladesh and Bhutan(c) Bhutan and Nepal ✅(d) None of these

(a) Principal port of Guinea-Bissau(b) Capital of Barbados, an island nation in the Atlantic Ocean ✅(c) A renowned seaport of Barbados(d) Calcutta

(a) New York(b) Sydney ✅(c) Calcutta(d) None of the above

(a) Solar energy ✅(b) Variations in air pressure(c) Changes in temperature(d) Atmospheric wind

(a) Helium(b) Hydrogen ✅(c) Nitrogen(d) Ozone

(a) Changes in the physical environment ✅(b) Atmospheric variations(c) Biotic shifts in the biosphere(d) Alterations in the hydrosphere

(a) 27 persons per sq. km(b) 7 persons per sq. km(c) 45 persons per sq. km ✅(d) 221 persons per sq. km

(a) East Asia(b) North-West Europe(c) North and South America(d) South Asia ✅

(a) Deposition of sediments(b) Deposition of remains of plants and animals(c) Extreme heat and pressure ✅(d) Solidification of magma

(a) Crust(b) Mantle(c) Core(d) Ocean floors ✅

(a) Crust(b) Mantle(c) Central Core ✅(d) Both (b) and (c) above

(a) 3,200 km(b) 6,400 km  ✅(c) 9,600 km(d) 12,800 km

(a) Cluster of islands ✅(b) Rocks under seas(c) Cluster of small states(d) Cluster of stars

(a) 1,000 degrees Celsius(b) 2,000 degrees Celsius ✅(c) 1,200 degrees Celsius(d) 2,600 degrees Celsius