Final answer:
Lameness in a front limb is typically indicated by head bobbing, as the horse compensates for discomfort by moving its head to minimize pain upon the affected limb's contact with the ground.
Step-by-step explanation:
Lameness in a front limb can often be indicated by head bobbing when a horse is in motion. This is because the horse will lift its head up when the lame leg hits the ground to minimize the weight and therefore the pain on the affected limb. This is a compensatory mechanism.
The options tail swishing, ears twitching, and mane flipping are generally not indicators of lameness in a limb and are more likely to be associated with irritation or external stimuli response.