Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike prokaryotes, eukaryotic cells also possess internal membranes that encase their organelles and control the exchange of essential cell components. Both types of membranes have a specialized structure that facilitates their gatekeeping function.
 
        
             
        
        
        
It boosts ecosystem productivity where each species no matter how small have a role to play
        
             
        
        
        
The limiting factor on the population of Arctic foxes is density-dependent. In population ecology, density-dependent processes happen when population growth rates are regulated by the density of a population. Density-dependent factors are factors where the effects on the size or growth of a population vary with the density of the population itself.
 
        
                    
             
        
        
        
Educate your family about endangered species in your area. 
Recycle and buy sustainable products. 
Recycle and buy sustainable products. 
Reduce your water consumption.
Volunteer. If you don't have money to give, donate your time
 
        
             
        
        
        
Answer:
This question lacks options; they are
A) Moral 
B) Culture
C) Society
D) Civilization
The answer is B. Culture
Explanation:
Culture refers to the customs or habitual practices of a group of people. It describes the beliefs, values, goals etc which is peculiar to a group of people or individuals. For example, the dressing, religious practices, music etc common to a group of people is their CULTURE. 
Based on this explanation, the practices, values, and goals shared by a group people as described by Chris is referred to as their CULTURE.