Answer:
<h2>Upper epidermis.</h2>
<em><u>H</u></em><em><u>o</u></em><em><u>p</u></em><em><u>e</u></em><em><u> </u></em><em><u>t</u></em><em><u>h</u></em><em><u>e</u></em><em><u> </u></em><em><u>a</u></em><em><u>n</u></em><em><u>s</u></em><em><u>w</u></em><em><u>e</u></em><em><u>r</u></em><em><u> </u></em><em><u>h</u></em><em><u>e</u></em><em><u>l</u></em><em><u>p</u></em><em><u>s</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
 
        
                    
             
        
        
        
D)Heat within Earth
Explanation:
The heat from within the earth is as a result of plate tectonics. Plates on the earth are driven by heat within the earth through convection currents. 
- Plate tectonics suggests that the earth are broken into slabs that moves on the weak and ductile material called asthenosphere. 
- Heat from within the earth causes the melting of asthenosphere. 
- The riding lithosphere which is cold will sink into the asthenoshpere. 
- Hot mantle materials will move to the surface thereby setting up a convection current. 
- Heat from within the earth rises to the surface due to plate movement. 
Learn more: 
Lithosphere brainly.com/question/9582362
#learnwithBrainly
 
        
             
        
        
        
Action potentials (i.e. nerve impulses) occur in several types of animal cells<span>, called </span>excitable cells<span>, which include </span>neurons<span>, </span>muscle cells<span>, </span>endocrine<span> cells, and in some </span>plant cells<span>. </span><span>It takes around 40 action potentials for a smell sensation to be reported.</span>
        
             
        
        
        
Answer:
Structure of large intestine: Large intestine is the part of digestive system which comes in the end. It consist of four parts. Large intestine length is 150 cm and width is 5 cm. 
Function of large intestine: It performs two main functions. 
1) Large intestine helps in the absorption of water and nutrients from the food which cannot be digested in the stomach. 
2) It removes the waste material from the body in the form of feces.