A. Excavation and filling of soil
B. Reinforcement of concrete structures
C. Installation of plumbing systems
D. Erection of structural steel
Answer: Excavation and filling of soil
A. Excavation and filling of soil
B. Reinforcement of concrete structures
C. Installation of plumbing systems
D. Erection of structural steel
Answer: Excavation and filling of soil
Additional Information: Earthwork involves the movement and manipulation of soil during construction projects, including excavation, filling, grading, and landscaping.
Subjects: Civil Engineering, Engineering