Correct Answer: Sympathetic

Solution : The fourth option is the most appropriate choice.

Sympathetic is the most appropriate synonym for gentle because both words convey a sense of kindness, tenderness, and a considerate, compassionate nature.

The meanings of the other options are as follows:

• Fierce means having a violent or aggressive nature.

• Ferocious is similar to "fierce" and means extremely aggressive or violent.

• Cruel means wilfully causing pain or suffering to others.

Therefore, sympathetic is the most appropriate synonym for gentle .