No all rock dont have to go through a complete life cycle......i mean some could it but  it dont have to be in any exact order ..... so your answer would be false
        
             
        
        
        
Answer: hi, im here to help :3
so, you can either use plants, use pesticides and fertilizers less often or the one thing i know is consider a rain barrel.
 
        
             
        
        
        
Answer;
The llama and the alpaca were used as beasts of burden in the Andes.
Explanation; 
-A beast of burden is drought animal that carries or pulls heavy loads, such as a donkey, mule, llama, camel etc.  
-The Andean animal used as a beast of burden is an Alpaca and the Llamas. They are docile, fluffy animals that can withstand the cold of the mountains. As such, they make excellent work animals.
-Male llamas have been been used as beasts of burden in the Peruvian and Bolivian Andes ranges for more than 4000 years. 
 
        
             
        
        
        
Answer:
c) A study of how disease rates vary among different population groups
Explanation:
Epidemiology is the systematic and scientific study of the distribution of the health-related issue in a specified population.
The Epidemiologists studies the disease and its cause in a population by the collection of the data which gives an insight in the distribution of the health issues in the population living from a small area like school to a country.
The epidemiological studies help the society by reducing the risk of the negative health outcomes, in spreading awareness about the health issues and in framing the health policies.
Thus, Option-C is the correct answer.