Agroup of similar cells that perform a specific function is a(n)
a. organ system.
b. organ.
c. tissue.
d. organism.

Its C , tissue (not the kind you sneeze into) is a similar group of cells that perform the same function. a tissue. and a group of tissues working together is called an organ. and a group of organs working together is called an organ system.

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution