Identify whether the following features belong to the Tang Dynasty or the Song Dynasty Completed the grand canal project started by the sui dynasty

boasted a strong and competent military force

Conquered by the mongol after facing threats from nomadic groups

Political corruption contributed to its downfall

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Tang dynasty - completed the Grand Canal project started by the Sui dynasty

Tang dynasty -  boasted a strong and competent military force

Song dynasty -  political corruption contributed to its downfall

Song dynasty - conquered by the Mongols after facing threats from nomadic

groups

Explanation:

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c.) biotic: snails; abiotic: temperature climate

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: