Please choose the correct answer to the question: Changes to abiotic factors in an environment can impact biotic factors. Which statement is the BEST example of this situation?

Answer1: Heavy rainfall increases soil erosion. Answer2: Melting glaciers cause sea levels to rise. Answer3: Cold temperatures cause rocks to weather. Answer4: Drought conditions increase competition among consumers.

Answer format: answer1/answer2/answer3/answer4
Answer: answer4