Consider the following statements. Select the option which correctly identifies true (T) and false (F) ones.
(i) Microorganisms act upon the dead plants to produce humus.
(ii) Autotrophs lie at the base of a food chain.
(iii) Large scale cutting of trees is called afforestation.
(iv) Branched part of a tree above the stem is called crown.
But base means last. Doesn't it?