I’m pretty sure those are the right answers
        
             
        
        
        
Answer:
   C.  mass
Explanation:
Properties such as conductivity and density are usually normalized, so usually do not depend on sample size. While the amount of heat required to melt a sample will depend on its size, the actual melting point temperature does not.
Of the items on your list, "mass" is the one that depends on sample size. In fact, we usually describe the size of a sample in terms of its mass.
 
        
             
        
        
        
I belive the answer to the first one is no I would have to assume a habitual zone is one area on a planet. for example, an air conditioned building vs. the Savvanah dessert. However I am not sure maybe other answers will help more on this one. Sorry.... Earth-like planet would of course need water, plant life, animals, oxygen, fossil fuels etc. A challenge we would face on a travel to another liveable planet: do we have engough transportation? engough fuel to make it? How long can we live on this planet? Who or what else is present here? etc. Yes I do think they should discover a planet with earth like qualities befor investing in tools to get us to them. So money is not wasted. (make sure to put this into your own words )
 
        
             
        
        
        
The answer is the DEA, or Drug Enforcement Administration. This department deals with drug-related illegal activity.
        
             
        
        
        
Answer:
Biomass energy usually provides an irreversible mitigation effect by reducing carbon dioxide at source, but it may emit more carbon per unit of energy than fossil fuels unless biomass fuels are produced in a sustainable manner.
Explanation: