Problem:OPTIONS:
- sand dune
- desert
- oasis
- esker

Answer the following question given this paragraph: An esker is a winding ridge of sand deposited by a stream of meltwater. Such streams flow underneath a retreating glacier. Q: What is a winding ridge of sand deposited by a stream of meltwater called? A:
****
A: esker

Answer the following question given this paragraph: The fovea is the region in the center back of the eye that is responsible for acute vision. The fovea has a high density of cones. When you bring your gaze to an object to examine it intently in bright light, the eyes orient so that the object's image falls on the fovea. However, when looking at a star in the night sky or other object in dim light, the object can be better viewed by the peripheral vision because it is the rods at the edges of the retina, rather than the cones at the center, that operate better in low light. In humans, cones far outnumber rods in the fovea. Q: What is the region in the center back of the eye that is responsible for acute vision? A:
OPTIONS:
- cornea
- lens
- pupil
- fovea
fovea

Answer the following question given this paragraph: The power of the ocean modifies landforms by erosion and deposition. Landforms modified by both erosion and deposition are seen in this photo. The cliff is being eroded by incoming waves. The beach is being created as sand is being deposited. Q: By what processes does the ocean modify landforms? A:
OPTIONS:
- splash and deposition
- shape and deposition
- sweeping and deposition
- erosion and deposition

Answer: erosion and deposition

Question: Answer the following question given this paragraph: sulfate is used as a cleaning agent because it is water soluble and acidic. Q: Sulfate is used as a cleaning agent because it is acidic and soluble in what substance? A:
OPTIONS:
- air
- salt
- oxygen
- water
Answer: water

input with options: Answer the following question given this paragraph: The development of new technology is called technological design . It is similar to scientific investigation. Both processes use evidence and logic to solve problems. Q: What term is used to describe the development of new technology? A:
OPTIONS:
- variation design
- evident design
- Smart Design
- technological design
output: technological design

Problem: OPTIONS:
- irregular flow
- quick flow
- slow flow
- backflow
Q: Answer the following question given this paragraph: Q: Heart valves prevent what kind of blood flow from happening in the heart? A:
Answer:
backflow