"吃嫩叶的动物" can be translated into English as "animals that feed on young leaves" or "herbivores that consume tender foliage".
The first translation is more straightforward and commonly used, directly stating the animals' dietary habit. The second one specifies the type of animals (herbivores) and the particular part of the plant they eat (tender foliage), offering a more detailed description. You can choose either based on the context and the level of detail you need.