I believe it is the Mexico's main crops include grains such as corn and wheat, tropical fruits and various vegetables.
 
        
             
        
        
        
Answer:
B. Look around, since even a changed ecosystem is still an  ecosystem.
Explanation:
Ecosystem refers to the interaction or relationship that exist between living organisms and its surrounding environment. This environment provides habitat, food and other needs to the organisms. If the people in the Midwest determine what kind of  natural ecosystem they are in, they have to look around the environment they are living. This environment includes all the plants and animals that survive the change which occurs due to humans intervention.
 
        
             
        
        
        
Answer:
longitude and latitude grids mark the globe for points of reference to the foot in degrees. then the globe is divided with alphabetical letters starting with a in greenwhich or 0000hours then moves around the globe from the 0 hour to the right until it reaches one hour before itself itself 2400 later so each zone is assigned a letter of the alphabet a-b-c and the hour is in conjunction with the letter so a=0 b=1 c=2 and so on until x is 2400 
Explanation:
 
        
             
        
        
        
Answer:
A new study published yesterday suggests that the short-term warming due. uses observations of surface temperature and Earth's heat budget spanning the last 40 years. concentration can be expressed using two different measures. So natural variability might have caused Earth to warm a little faster
Explanation:
hope this answers you question. 
 
        
             
        
        
        
Answer:
1- Option (D)
2- FALSE
Explanation:
The seafloor spreading takes place because of the divergent plate motion. Alfred Wegener observed this motion of the seafloor and the continents but was not able to explain the main mechanism behind this until the new theory came into the picture. The divergent motion of seafloor and the motion of the continents were explained by the universally accepted theory known as the Plate tectonic theory. This theory was able to explain the mechanism behind this plate motion.  
The study of the seafloor spreading provided some pieces of evidence that supported the continental drift theory. They gave a basic idea about how the oceanic plate gets subducted (consumed) at the convergent plate motion that undergoes partial melting at greater depth. As a result of which the magma rises up to the surface on the overriding plates.
The crust represents the outermost layer of the earth. They are of 2 types, namely the oceanic and the continental crust. These crusts when slide past one another in a transform plate boundary, it is neither created nor destroyed. It remains conserved.
Thus, the correct answers are given above and the second statement is false.