Species whose ranges overlap, but do not interbreed because they are found in different environments ...

Species whose ranges overlap, but do not interbreed because they are found in different environments or areas within
  the range, are said to exhibit:a.
   habitat isolation.
  b. temporal isolation.
  c. biological isolation.
  d. evolutionary isolation.
  e. environmental isolation.

Question 2

The ranges of black bears and brown bears overlap. However, black bears spend most of their time in the woods and
  brown bears spend most of their time along the river. Which of the following best describes why black and brown bears
  do not interbreed?
  a. habitat isolation
  b. temporal isolation
  c. biological isolation
  d. evolutionary isolation
  e. environmental isolation