Which of the following would you list as a non-essential expense? a. A fashionable pair of blue jeans. b. Electricity for your home. c. Insurance on your car. d. A bill for data usage on a smart phone. Please select the best answer from the choices provided A B C D

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.