In the grasslands, trees do not replace the grasses as a part of an ecological succession because of

(a) Coniferous trees

a. Orderly and sequential

Plants having little or no secondary growth are Grasses

(b) In organisms called lichens, a chlorophy llcontaining partner, which is an alga, and a fungus live together fungus provides shelter, water and minerals to the alga and, in return,...

(c) 1, 3 and 3

(c) 1, 3 and 3

(c) the native species have not evolved with these organisms. 

The trees are used to make tree houses, to swing swings, to play hide and seek, to get shade in summer, to build fire for camp parties in winter, to...

(c) Van Mahotsav