<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>
A thick tree ring indicates that the year was good for its growth with good feeding, enough water and sun. The thickness of the tree can suggest when the growing time was longer at the time of warmer times and when shorter with cooler times. With this explained, we can choose Warm year as the correct answer.
Explanation:
photosynthesis is the major process that transfer some of the chemical energy in food (glucose) to the chemical energy in adenosine triphosphate (ATP).
