The correct answer is: d) All of the above.
Exploring alternative construction materials could help to reduce pressure on sand and gravel resources, promote sustainable practices, and lower construction costs.
Sand and gravel are essential construction materials, but they are also non-renewable resources. The global demand for sand and gravel is increasing, and this is putting a strain on these resources. Exploring alternative construction materials could help to reduce the demand for sand and gravel, and this would help to protect these resources.
There are a number of alternative construction materials that are being developed, including recycled materials, waste materials, and natural materials. These materials can be used to construct a variety of buildings and infrastructure, and they can help to reduce the environmental impact of construction.
In addition to reducing the environmental impact of construction, exploring alternative construction materials could also help to lower construction costs. Some alternative construction materials are less expensive than traditional materials, and they can also be used to construct buildings that are more energy-efficient and durable.
Overall, exploring alternative construction materials could have a number of benefits. It could help to reduce pressure on sand and gravel resources, promote sustainable practices, and lower construction costs.