Answer:
There are dried-up riverbeds on Mars.
Explanation:
Now there is some evidence that is known that in Mars there is some water in layers below the soil, that mean that there are some possible storage of water. The life in Earth as we know it, it is possible just with the presence of water, that is the reason of this important knowledge.
In Mars atmosphere is almost carbon dioxide (aprox. 95 %) and just some traces of water, so the main source is located in soil.
A.) It can be found in "North America"
Hope this helps!
I believe the answer you're looking for is temperature and precipitation.
Climate is based on the amount of rainfall (i.e. a rainforest) or the temperature (i.e. a tropical climate)
Answer:

Explanation:
Given

See attachment
Required
Find 
To do this, we make use of the following theorem
--- angle at the center and angle between two tangents add up to 180 (i.e. they are supplementary angles)
So, we have:

Collect like terms


Answer:
Event 1: Italy's location encouraged trade.
Event 2: Italian merchants gained wealth and political power.
Event 3: Italy's families became art patrons.