(a) State three advantages and two disadvantages of manual labour. (b) Enumerate four qualities of good draught animals. (c) State two precautions to be obs...

(a) State three advantages and two disadvantages of manual labour. (b) Enumerate four qualities of good draught animals. (c) State two precautions to be observed when using draught animals. (d) Explain how power from each of the following sources are harnessed for use on the farm: (i) sun, (ii) biogas.