Name 2 fresh water biomes and one salt water biome

ANSWER:
freshwater biomes.. lakes, rivers
salt water biome: oceans

EXAMPLE: Freshwater biomes have less than 1% salt and are typical of ponds and lakes, streams and rivers, and wetlands. Marine biomes have more salt and are characteristic of the oceans, coral reefs, and estuaries.

c) Serfs worked in the manor house, and peasants worked on the land.

Explanation:

The servants worked in the mansion and peasants worked on the land, so the servants had more "perks" and for that reason, they could rise from the bottom of the social hierarchy.

Peasants were the people who took care of the land and agriculture in general. A peasant could own his own land, but it was more common for him to work for the feudal lord, receiving a plot of land to live and protect.

The servants, on the other hand, served the nobility and could live at court, although it was necessary to pay tribute, they had a better life.