Answer:
No two communities are the same because each one has something specific to them whether it is house structure, rules of the community, how big the community is, and the people that live there. 
Explanation:
A great example of this is Weston, FL and Pembroke Pines, FL. In Weston you will find higher class people living there such as celebrities and athletes. The best community to use as a comparison is Botanica Weston. There are mansions in that neighborhood along with many sport icons living there. In Pembroke Pines, it is more of a family based city. In the community Pembroke Falls, you will see more family type houses and a large clubhouse with a pool, game room, and event room to host parties in. Each community has a different identity and no two communities are the same. 
 
        
             
        
        
        
<span>Much of our understanding of the basic structure and composition of Earth and the other planets in our solar system is not strenuously debated. We can infer a surprising amount of information from the size, mass and moment of inertia of the planets, all of which can be determined from routine astronomical observations. Measurements of surface chemical composition, either by direct sampling (as has been done on Earth, the moon, and Mars) or through spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula. Remote observations of the gravitational field can be used to understand how a planet's mass is distributed, whereas the strength and shape of the magnetic field provides some constraint on the structure of a metallic core. The specifics of structure and composition, however, are much more debatable. And it is these details that tell us a much more extensive and ultimately more interesting story about the internal dynamics of the planets and their evolution. As a result, trying to determine them is frontier research in almost all fields of earth and planetary science.
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hope that helped *smiles*
        
                    
             
        
        
        
Answer:
 this is because Steel is more difficult to magnetise and demagnetise but an iron core makes a temporary electromagnet because its lose its magnetism when the switch is open and and steel core is used to make a permanent electromagnet