1) .............. are also known as gnawing animals.

A}  Ruminants   
B} Rodents
C} Spiracles 
D} Reptiles
E} None of these    
F} Amphibians 



2) Herbivores animals have sharp ________ teeth to cut grasses.

A} Canines   
B} Incisors
C}  Molars    
D} Premolars
E} None of these
F} No teeth 

Dear student,
Please find below the answer:

1. The correct option is (B).
Rodents are also known as gnawing animals because they have two long pairs of incisors which are used to gnaw on hard foods like nuts.

2. The correct option is (B).
Herbivores feed on plant material. They have sharp incisors to cut the plant matter like grass. 

Hope this clears your doubt.
Regards.