The figure below represents sedimentary layers in a single geographic location. use the diagram below to answer the question.
a)fine sands are generally deposited by wind. the absence of marine fossils and the presence of land animal fossils suggest that the area was dry, sandy land, such as a desert.
b)
graded bedding is found as a result of underwater landslides. the presence of marine fossils confirms that the area was under the sea at one time.
c)
the presence of marine fossils in a limestone confirms that this rock layer formed in an ocean.
d)
none of the above

What is the best thing for an applicat to do to prepare to write a cover letter

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine. what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Which u. s. state is home to the fewest species of mosquitoes?