Answer:
Option A
Explanation:
Options for the question are 
   a)  pattern
    b)  directional forces
    c)  scale and proportion
    d)  emphasis and subordination
Solution - 
The inclusion of shapes and design of tanks, grenades, helicopters etc. in the carpets of Afghans started around 19th century during the war time. These shapes were included mainly with two perspective a) either as an essential element of a landscape or b) as a icon in a pattern.  
Not only this, the Afghans carpet also depicts the shapes of world trade tower and the attack on it as a part of its design.  
Hence, option A is correct
 
        
             
        
        
        
Answer:
one that has an unstable nucleus
Explanation:
An isotope is defined as a chemical variant  present in an atom with different number of neutron but same number of protons.
Radioactive decay is the sudden breakdown of an atomic nucleus allowing matter and radiation to be emitted from the nucleus. A radioisotope with unstable nuclei undergoes radioactive decay because they do not have adequate binding energy to keep the nucleus together. there are four  types of Alpha, Beta, Gamma Decay and Positron Emission.
Hence, the correct option is "one that has an unstable nucleus"
 
        
             
        
        
        
Im not sure how to answer this since there were no choices given but I will answer by telling you what nuclear fusion is...
so basically nuclear fusion is the merging or combining of 2 isotopes, typically isotopes of hydrogen, under conditions of extreme temperature and pressure thus resulting in the release of massive amounts of energy. I think the answer to your question would be new types of electricity because the heat emitted from the reaction could be turned into electricity by using its steam. This is what happens in nuclear reactors  
i hop this answers your question 
        
             
        
        
        
Answer:
The cell membrane, or in plant cells, the cell wall
Explanation:
In a plant cell the cell wall helps maintain structure, and in animal cells, the cell membrane regulates what goes in and out of the cell and acts as a structure