I believe the answer is A hope this helps :)
        
                    
             
        
        
        
Answer:
São Paulo is a city in Brazil that faced the worst drought in Brazil in the last 100 years between 2014–17. 
The reason of the drought was diminished rain falls from last three third consecutive year in the region. Humans were somewhere responsible for the drought and less rainfall because this was caused by expansion of deforestation into the Amazon basin. Deforestation disturbed the environmental cycle that caused less amount of rain in São Paulo, Brazil.
 
        
             
        
        
        
Answer:
Clogging engine cooling systems - Bra Mussels
Extinction of bandicoots - Feral Cats
Blocking water boats - Water Hyacinths
Hope this helps :)
 
        
                    
             
        
        
        
The theory of evolution proposed that a series of catastrophes or mass extinctions followed by repopulation could explain why species change over time
        
             
        
        
        
A. Prokaryotic cells DO NOT have a nucleus or membrane bound organelles. Eukaryotic cells do. 
Explanation: A simple way to remember the is by PROkaryotic has NO nucleus. (Pro-no)
EUkaryotic has a nucleus. 
(Eu- sound like you, you have cells and they have a nucleus.)