Concept:The work rate of draught animals is affected by factors that determine their energy, strength, and working efficiency.
Explanation:I. Feed intake: A well-fed animal gets more energy for sustained work.
II. Breed of animal: Different breeds have different strength and endurance levels.
III. Harness for hitching: A good harness improves movement and reduces discomfort.
IV. Height of animal: This is not a direct factor in determining work rate.
Therefore, the correct factors are I, II, and III only.
Answer:A. I, II and III only