Hey there!
A Burrowing owl's habitat is destroyed which is due to human activities and will come under Artificial destruction via human influence and not due to a natural destruction like cyclones, High Richter scale earthquakes, hurricanes with extremely high knot speeds, etc. Instead I'll say because of which the population of the burrowing owl will obviously decrease because they're more adapted to "their previous environment" and most likely "wouldn't adapt to a new unfamiliar environment". 
To break these contradictions down simply said "they're unaware of the rules, regulations, type of soil, type of trophic levels, number of predatory organisms, etc. this makes it pretty hard to move from their once said naturally provided nature-made habitat to the burrowing owl, which got lost due to habitat annihilation by human cause. Further making the owls to adapt and change their "NATURAL TRAITS" to make it "CUSTOM" because of which these aren't going to help them instead they'd go either extinct by moving to a newly known unfamiliar habitat rather than their naturally nature gifted habitation. 
So Yeah, the correct option [after the question mark ends] to be the least likely outcome would've been  "the population of species of burrowing owl maybe increase as per arriving in a new habitat or introduced to newly made surroundings". This is "Highly and the most unlikely" or the "least likely predictable outcome" for burrowing owls. Introduction of species to newer habitats without any prior training, kills the species and it's progenies.
Hope this helps  you and gives you the detailed analysis for this query for burrowing owls!!!!
 
        
                    
             
        
        
        
Cancer and Tumors...
           ........ Hope it helps, Have a good rest of the day:)
        
             
        
        
        
The two serous membranes of pericardium are :visceral pericardium,parietal pericardium.
        
             
        
        
        
<span>Depletion of the ozone layer. Choloroflourocarbon (CFCS) are dangerous because of their destructive reaction with Ozone particles, which provide the Earth with a protective layer or shield against UV radiation. Depletion of the ozone layer begins when when CFC gets into the stratosphere. Sunlight breaks up cfcs releasing Chlorine Atom. Chlorine atoms in turn react with Ozone, starting a chemical cycle that destroys the ozone layer in that area. Once the ozone layer is depleted, there's nothing holding back the harmful UVB wavelengths of ultraviolet light (UV light) from passing through the Earth's atmosphere causing havoc on plants and animals.</span>
        
             
        
        
        
Probably water. Abiotic means not living, such as sunlight or water.