Q15. Why aquarium is not a natural ecosystem? i). Because it is man made ecosystem which is designed for faunal life
(ii). Because it is not having transfer of energy and material
(iii). Both (i) & (ii)
(iv). None of these

Which best explains why england had the highest standard of living in the world in 1990? a.england started industrializing before the rest of the world b.england had the highest population in the world. c.england hadthe most fertile soil in the world. dengland had more natural resources.

Which are results of technological advances? increased people's exposure to new ideas created a global culture valued by people around the world brought harmony to diverse groups of people reduced the number of people living in rural areas

Which of the following best describes the circumstance under which countries block the importation of certain products into their country? a. importation blockade b.trade barrier c.trade inhibitor d. domestic protection act