*5(a)* (i) *Organic farming*: Uses natural inputs like compost and avoids chemicals. (ii) *Mixed farming*: Growing crops and rearing animals on the same farm. (iii) *Mixed cropping*: Planting two or more crops on the same land at the same time. *5(b)* (i) Oil and water – *Heterogeneous* (ii) Salt and water – *Homogeneous* (iii) Ethanol and water – *Homogeneous* *5(c)* (i) The sun is renewable because: - It is naturally replenished. - It does not run out. (ii) Differences between heat and temperature: - Heat is energy; temperature is a measure. - Heat flows from hot to cold; temperature shows hotness. - Heat depends on mass; temperature doesn’t. *5(d)* (i) *Leaching*: Washes away nutrients, reducing nitrogen in the soil. (ii) *Removal of leguminous plants*: Depletes nitrogen since they add nitrogen to soil through fixation.