Which of the following would not cause habitat change?
a.
building a dam on a river
b.
a hurricane
c.
introducing new hiking trails
d.
none of the above

D: None of above

Explanation:

Habitat change refers to changes in its biotic and/or abiotic factors due to natural or man-made factors. Construction of dam on a river alters the flow of water upstream and downstream which in turn affects the aquatic populations. It also affects the downstream habitats by affecting the water availability.  

Hurricane is natural cause of habitat change while construction of new hiking trail is another human activity that changes the habitat. Construction of hiking trails among the forest regions affects its flora and fauna. Hence, all the given factors could lead to habitat change.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".