Human activity can affect the river ecosystems because first of all humans take the water and use it for themselves, they also pollute it, disturb the ecosystems and kill fish or oysters etc. in the ecosystems.
I believe the answer is true because we spill liquids during these events causing more erosion
Greetings!
There are four time zones in mainland USA. Los Angeles is in the Pacific TZ and New York City is in the Eastern TZ. There are 3 hours between each time zone. Therefore, it would 4:00 pm in Los Angeles. (7-3=4)
Hope this helps.
-Benjamin
Answer: A, burning fossil fuels