Correct answer choice is:
The style of dress and government.
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Mongol </span>men usually wore thick jackets and underneath these hemp or cotton pants which were tucked into leather boots<span>.
During winters they use to wear dresses which were mostly made up of fur and leather. They also wore</span><span> turbans.
</span><span>The Mongol style of government is also known as the Mongolian-style democracy. This sort of government respected the ethnic and cultural diversity of the Empire.</span>
Lapita culture or the prehistoric Pacific ocean people have developed skills in building crafts to sail the seas.
Their greatest obstacle are the miles of water separating islands. In order to reach different land masses, they have develop skills to sail and navigate the seas.
(5a - 2a) +3
Collect terms: 5a -2a = 3a
3a +3 is the answer because 3a can’t be added to 3 as it’s on its own.