Algae → water flea → small fish → big fish use the food chain to answer the question. what would most likely happen to the population of the water flea if the algae decreased? a) it would increase. b) it would decrease. c) it would not change. d) it would first increase, then decrease.

B) It would decrease.

Explanation:

According to the food chain, the algae represents the producer, the water flea represents the primary consumer, the small fish represents the secondary consumer while the big fish represents the tertiary consumer.

If the population of the producer (the algae) decreases, this will directly limit the amount of food available to the primary consumer (the water flea). The food limitation will lead to a reduction in their population.

Hence, the correct option is B.

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 !