Answer:
uneed to read and work this out
 
        
             
        
        
        
There are microorganisms that are able to live in extreme environments under adverse conditions of pH, temperature and salinity. These microorganisms are classified as extremophiles.  Within the group of extremophiles there are halophilic bacteria, which are those capable of living in extremely saline environments.
One biological factor that all living things are subject to suffer from is osmotic pressure. Halophilic microorganisms have developed mechanisms to adapt to saline environments where osmotic pressure acts with great intensity on individuals. These bacteria change the chemical composition of their membranes and also accumulate osmoprotective compounds in their cytoplasm to compensate for osmotic stress.
RAMIREZ, N; SANDOVAL, AH  y  SERRANO, JA. Las bacterias halófilas y sus aplicaciones biotecnológicas. Rev. Soc. Ven. Microbiol. [online]. 2004, vol.24, n.1-2 [citado  2019-09-22], pp. 12-23 . Disponible en: <http://ve.scielo.org/scielo.php?script=sci_arttext&pid=S1315-25562004000100004&lng=es&nrm=iso>. ISSN 1315-2556.
 
        
             
        
        
        
Olafactory bulbs because it has to do with nerve signals and neurons. Brain because it is the center of the nervous system and the closest to the nose in terms of the nervous system. 
        
             
        
        
        
The correct option is INTRODUCTION OF EXOTIC SPECIES;
Exotic species refers to an introduced specie of an animal which is alien to the ecosystem in which it found itself and which has been transported to that ecosystem either intentionally or by accident. Exotic species normally have varieties of effects on the ecosystem to which they are introduced, sometimes the effect will be good and sometimes the effects could be devastating depending on the particular situation. 
Factors which promote diversity include: larger size of the ecosystem, longer growing seasons and climatic stability.<span />