The following sentence has been divided into parts. One of them may contain an error. Select the part that contains the error from the given options. If you don't find any error, mark 'No error' as your answer.
The present-century threats to our environment, / which include interfering species, ailments, pollution and / a boiling temperature, were putting wildlife populations at peril.

Correct option is C

The error in this sentence is in part C. The phrase "a boiling temperature" is not typically used in this context; a more appropriate term might be "rising temperatures" or "increasing temperatures."
Additionally, the phrase "at peril" should be corrected to "in peril," which is the standard usage when indicating that something is at risk or endangered.
Thus, the corrected segment could read, "rising temperatures, were putting wildlife populations in peril."