I don’t think this has all of the info to answer this question
<u>Answer:</u>
<em>Earthworms are very sensitive towards the odor. </em>
They use it for locating the food in the soil. Because earthworms are dependent upon microorganism in the soil, they must be sensible for the <em>presence of any food around them if they do not respond the odor then they may die. </em>
Earthworms have the escape response so they quickly respond the external stimuli at the part they are stimulated. <em>With the increasing frequency of stimuli at the same part they slowly decrese the response towards it.</em>
