ASAP! Two Science Questions.?

Question

Here They Are:

Which of the following aquatic ecosystems would have the lowest salinity?

A) estuaries

B) rivers

C) coral reefs

D) open oceans

Which ecosystem would experience the most drastic changes in a 24-hour period?

A) open ocean

B) intertidal zone

C) lake

D) coral reef

Answer 1

-The one that is freshwater would have the lowest salinity.

-Changing tides would be the most drastic change for an ecosystem.

Answer 2

1.  B) rivers

2.  B) intertidal zone

Answer 3

my guess would be b for both.