Hi, can someone help, please? I'm offering 78pts and brainliest.
A dam is built in a remote area to provide electricity to nearby towns.
What is an unlikely effect of the dam?

A. Increased weed growth downstream from clear water
B. Increased fertility of the land downstream
C. Decreased aquatic life upstream from warmer temperatures
D. Decreased farming downstream from the infertile soil

B. Increased fertility of the land downstream

Explanation:

Dams are constructed across river to prevent water flow they conserve water for human use.

It has both advantages and disadvantages.

Dam are expensive to construct

Dam are used in generating hydropower, for supply of water for domestic use, irrigation,industrial use.

Dams detract from natural settings, ruin nature’s work

Dams leads to extinction of natural habitat, It could result in flood due to over flow, it leads to migration of people out of there homes due to it construction. Construction of dam is unlikely to increase fertility downstream.

Option B.

Increased fertility of the land downstream.

Explanation:

Dam refers to structures built that serve as a barrier for water outflow and retain water. Dams trap sediments,gravels, logs, rock river beds where fishes spawn. It is expensive to construct dams. Dams construction normally lead to extinction of aquatic animals from their habitats and it can lead to flooding. When this occur, there will be nutrient depletion . Aquatic lives can be a source of nutrients and when there is extinction the land will be infertile

c.more precipitation,but only when emission levels.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !