Answer:
The correct answer is "Problem: A slope in Mr. Franklin's back yard is eroding quickly. Solution: Stack large flat stones to build a retaining wall at the bottom of the slope; water will filter through the cracks".
Explanation:
The missing information of this question is the following:
Criteria:
At least 10 feet in length
Water must be able to pass through
Sturdy enough to catch moving soil
Constraints:
Structures in neighborhood cannot be over five feet high
Does not require digging
Does not require concrete
Does not require hired professionals
The missing options of this question are:
A) Problem: When Mrs. Lin waters her garden, it runs downhill, leaving many plants dry. Solution: Install a simple sprinkler system with rubber hoses running along the length of the garden.
B) Problem: A slope in Mr. Franklin's back yard is eroding quickly. Solution: Stack large flat stones to build a retaining wall at the bottom of the slope; water will filter through the cracks.
C) Problem: Mr. Hall's front yard light wakes people up at night because it is very bright. Solution: Replace the bright bulb with a dim one, and dig small holes along the front walkway to secure small, inexpensive solar lights.
D) Problem: Mary planted her garden at the base of a hill so it would not lose water, but it is too shady and her plants are not getting enough sunlight. Solution: Have landscapers remove the large, dead tree that is blocking the light.
The correct answer is option B) "Problem: A slope in Mr. Franklin's back yard is eroding quickly. Solution: Stack large flat stones to build a retaining wall at the bottom of the slope; water will filter through the cracks".
Successful solutions require to consider the criteria and constraints of the problem, proposing novel strategies to achieve the goals. The problem of Mr. Franklin's back yard quick erosion, and particularly, the solution of stacking large flat stones to build a retaining wall at the bottom of the slope to achieve water filtration through the cracks fit both the criteria and constraints of the problem. Stacking large flat stones does not require digging, concrete or hiring professionals, and doing so at the bottom of the slope will avoid constructing a structure that is over five feet high.
