What characteristic do the early Roman calendar and the Islamic calendar share? They are both lunar calendars.
They are both solar calendars.
They both have animals that represent each year.
They both have the same number of months in a year.

They both have animals that represent each year.

Explanation:

The Roman calendar and the Islamic calendar are different from each other but share some similarities, that is they both have animals that represent each year.

Roman calendar is solar calendar while Islamic calendar is lunar calendar.  Islamic calendar have 12 months each year while Roman calendar have only 10 months each year.

Hence, the correct answer is "They both have animals that represent each year."

The early Roman calendar and the Islamic calendar are both lunar calendars.

Lunar calendars:

The Romans originally used a lunar calendar in their earlier years and the Muslim calendar is a lunar one.

In conclusion, the early Roman calendar and the Muslim calendar are both lunar calendars.

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abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.