What is the term for animals that survive solely on herbs?

• The required answer is - Herbivorous.

• Herbivorous (Adjective)
- English meaning: (Of animals) Eating only plants.
- Bangla meaning: তৃণভোজী।

Example Sentence:
- Elephants are herbivorous animals, feeding mainly on grass, leaves, and fruits.
- The dinosaur was believed to be herbivorous, living on a diet of ferns and other prehistoric plants.
- Herbivorous insects like caterpillars can cause significant damage to crops.

• Other options:
- Carnivorous: Eating meat; consisting of meat.
- Bangla meaning: মাংসাশী।

- Omnivorous: ​Eating all types of food, especially both plants and meat.
- Bangla meaning: সর্বভূক।

- Vegetarian: A person who does not eat meat or fish.
- Bangla meaning: শাকাহারী বা নিরামিষাশী ব্যক্তি।

Source: Merriam & Webster Dictionary, Oxford Dictionary, Accessible Dictionary, English-Bangla Dictionary.