City-state government was often conquered because they did not have enough resources to protect themselves
Explanation:
A city-state government is an independent autonomic political system which usually compromises just a single independent city which is governed by itself with sovereignty over its territory. The city-states like Greece, Italy, and Rome etc became very powerful. 
The main reason for these city-states being conquered more was the accumulation of wealth and aristocracy in such states.
Heavy taxes, religion, slavery also lead to social unrest and conflicts among these city-states which made them weaker.  These internal conflicts also made them lose their resources and vulnerable to be conquered by other powerful empires. 
With the increasing power of neighboring states, like in the case of Rome and Greece, the Romans became mightier than Greeks at one point and conquered the Greek city-states. 
 
        
             
        
        
        
Answer: She is involved in Taxonomy 
 
Explanation:
What is Taxonomy?
Taxonomy is explained as the science of giving names, classifying and describing plants , animals and microorganisms. 
A taxonomists will look at form, structure, behaviour and biochemical reactions in order to put species into their classification.
 
 
        
             
        
        
        
The correct answer is hydrocephalus.
Hydrocephalus refers to the condition in which the accumulation of fluid takes place in the ventricles (cavities) deep inside the brain. The excess fluid enhances the size of the ventricles and applies pressure on the brain. The cerebrospinal fluid usually flows via the ventricles and bathes the spinal column and the brain. 
 
        
             
        
        
        
Glaciers cover 10% of land surfaces.
Hope this helps