The most likely reason would be that this city has either been expanding and with that effectively decreasing the amount of available living spcace the animals and trees as well have, at the same time it is possible that this city has been emiting increased amounts of the different types of pollution - one example being light polution which can strongly influence certain ecological niches.
Answer:
The condition of lactose intolerance is usually produced by the inheritance of recessive genes that sport a mutation in them which affects the production of lactase, the enzyme that breaks the sugar present in milk, lactose. When two inherited genes with this mutation happen in a person, they will develop the condition that is also known as congenital lactase deficiency. This means the body will not produce the enzyme to break up the bonds present in milk´s sugar.
However, sometimes, this condition can be inherited from one of the parents, and not from both, which would make one of the alleles fully functional and the other defective. The result would be that this person would still be able to produce lactase, but in much smaller amounts, so they would still have some of the symptoms and signs characteristics of lactose intolerance, but they would be able to digest at least a portion of the lactose present in milk and dairy products.
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*The<span> </span>13th amendment<span> abolished slavery in the United States and provides that "Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States</span><span>
*</span>The 14th amendment granted citizenship to "all persons born or naturalized in the United States" which included former slaves who had<span> just been freed after the Civil War.
</span>*The 15th Amendment to the Constitution granted African American men the right to vote by declaring that the "right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude."
(By the way, I thought that I should bring to your attention the incorrect use of word choice in your question. A trend is meant to be something that is in style, or generally up to date. You should have used the word "impact" instead)
