An elderly woman in a nursing home no longer goes outside to enjoy the sunshine and fresh air, has reduced her meat intake because her dentures don't fit well, and has recently been having difficulty concentrating on conversations with others. this may be leading to a deficiency of which vitamins? vitamin d and vitamin b12 vitamin a and folate vitamin c and thiamin vitamin k and riboflavin

Vitamin D and vitamin B12

Explanation:

Vitamin D is very important for the body as it helps in the calcium absorption by the body. The body should be in regular exposure with sun.

Vitamin B12 is mostly found in meats and non vegetarian foods. Not taking meat because of any reason will affect the brain and body.

Due to the deficiency of vitamin B12 and Vitamin D, elderly women is having difficulty in concentrating on conversations.

one would be wind another would be water density

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 !