What are the various methods for weeds control?

The different methods of weed control are the mechanical method, the social method, the chemical method, and the biological method. 

(i) Mechanical methods incorporate evacuating, weeding with the trowel, hand hoeing, intercultural, plowing, burning, and flooding.

(ii) Social method incorporates the correct bed planning, timely sowing of crops, intercropping, and trim turn.

(iii) In Chemical method, Herbicides and weedicides like 2,4-D are showered on weeds to crush weeds. 

(iv)Biological methods are the natural weed control strategies where few other living beings like sheep, goat, tansy flee beetle, cinnabar moth etc., that devour and devastate the weeds are used.  

Hence, the correct answer is option D.