Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: Changes to abiotic factors in an environment can impact biotic factors. Which statement is the BEST example of this situation?
Drought conditions increase competition among consumers.
Acid rain reducing the pH level in a lake, killing fish.