111660
Grazing animals that tend to eat hard , silica-rich grasses , have high-crowned teeth , which are capable of grinding tough plant tissues and do not wear down as quickly as low-crowned teeth .
 Grazing
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Grazing