name the part of alimentary canal that grinds lumps of food up and mixes it with saliva (without explanation)

Mouth or oral cavity

Explanation:

The alimentary canal is the long passage through which the food passes. It includes components like mouth, esophagus, stomach, intestines, and anus. It is supplied by digestive juices and secretions by other organs like liver, and pancreas which are not the part of the alimentary canal. Mouth or oral cavity or buccal cavity is the first component of the alimentary canal from where the food enters in the body. It is grinded and masticated by the teeth and mixed with the saliva so that it is converted into liquid form easily swallowed through the gut. The saliva is produced by the salivary amylase enzyme present in the mouth.

answer; ////increased water pollution; ///////////////////////