Final answer:
The correct statement is a) one is false, two is true. Statement 1 is false because brown dog ticks do not carry diseases to humans. Statement 2 is true because American dog ticks can carry several diseases, such as Rocky Mountain spotted fever and tularemia, and transmit them to humans through their bites.
Step-by-step explanation:
The correct statement is a) one is false, two is true. Statement 1 is false because brown dog ticks do not carry diseases to humans. They primarily infest dogs and can transmit diseases to them, but they are not known to transmit diseases to humans.
Statement 2 is true because American dog ticks can carry several diseases, such as Rocky Mountain spotted fever and tularemia, and transmit them to humans through their bites.