Answer:
Death,bodily waste.lightening commercial fertilizer,legumes with nitrogen fixing bacteria. 
hope it help 
please mark as brainliest 
 
        
             
        
        
        
Answer:
 3. He should encourage audience participation by asking questions or requesting examples. 
Explanation:
When an audience is not engaged in a speech it means that they are not interested in the contents of the speech or rather the way contents have been presented. 
The purpose of a speech is to impart knowledge to a large group of people if the audience is not interested in the speech then the main function of a speech is not fulfilled. The speaker should not ignore the speech or provide additional data but instead, encourage the audience to participate. This would involve the audience in the speech.
Hence the answer is 3. He should encourage audience participation by asking questions or requesting examples.
 
        
             
        
        
        
what are the answers? I need to know the options :/
 
        
             
        
        
        
<span>Trees grow below or above the timberline, or tree line, depending on the environmental conditions present. Alpine tree lines are common near or on mountains and mountain ranges. The weather above the timberline is too cold and possibly too dry for trees to grow and take root. Desert tree lines are common in and near deserts. The soil is too dry for the trees to take root and get the water and nutrients they require. Desert-Alpine tree lines are environments where the elevation is too high and the soil too dry to foster tree growth.</span>
        
             
        
        
        
They are called contour lines