Shoring is used to prevent movement of soil, underground utilities, roadways, and foundations.

• A. A support system for trench faces
• B. An insulation method for pipes
• C. A drainage technique for groundwater
• D. A barrier to prevent vehicle intrusion

Answer: (A)

Shoring is a support system used during excavation to hold back soil and stabilize nearby structures. It resists earth pressures to keep trench faces in place, protecting workers and preventing movement of adjacent underground utilities, roadways, and foundations. That makes it the best description among the options. The other choices refer to insulation for pipes, drainage of groundwater, or barriers to vehicle intrusion, which are unrelated to stabilizing soil and nearby infrastructure.