Answer: Mental Labour, According to this definition, mental work refers to planning, organizing, coordinating, and managing duties and tasks that we perform during the course of our lives. People's worries about their ability to manage their time efficiently and effectively. 
Explanation:
I explained at the top-
 
        
             
        
        
        
<span>This abnormality in chromosome structure is caused by breaking off a fragment from one chromosomes and it moving forward to attach with another...</span>
        
             
        
        
        
Answer:
If it´s not A then choose C
Explanation
If they were land animal and could not swim then the only logical reasoning would be that the two pieces of land drifted apart from each other and the fossils were in between them and that´s why they ended up in the ocean.
 
        
                    
             
        
        
        
who developed the first system of classifying organisms 
A: linnaeus
B: Darwin
C: mendel 
D: watson 
HURRY HELP ME OUT ASAP!!
 
        
             
        
        
        
Plates include both oceanic crust and continental crust. Stable subduction zones involve the oceanic lithosphere of one plate sliding beneath the continental or oceanic lithosphere of another plate due to the higher density of the oceanic lithosphere.