Answer: Specie
Explanation:
The basic unit of classification of living things is species. species is the smallest unit containing members which have the largest number of features in common and usually interbreed among themselves. 
Thus, the group of deer describes a specie since they can interbreed freely and are similar in characteristic features.
 
        
             
        
        
        
Answer:
An effective strategy for stepping in if someone appears to need help is <u>directly check in with the person</u><u>.</u>
Explanation:
Many a time, our closed ones will be fighting battles we are unaware of. We are so busy in our lives that we either do not notice the problems of our loved ones or we just think that if they need help from us, they will ask it themselves. But we shall realize the fact that many people will not ask for help themselves due to certain reasons.
So, it is best to always check upon the persons you love if you think that they might need any help.
 
        
             
        
        
        
Answer:
An arterie is a vessel that carries blood away from the heart, and a vein carries blood to the heart
Explanation:
Mark as barinly plzzz :))))
 
        
             
        
        
        
Cell walls are rigid which gives plants their shape. Animals have only cell membranes which allows animals to be flexible as animals are moving organisms. Plants, on the other hand, are sturdy and upright and are sessile organisms. Cell walls allow plants to grow upright as high as their maximum height and to be sturdy enough to survive harsh environments.
        
             
        
        
        
<u><em>Species</em></u> is the category that can mate and produce fertile offspring.