Step 1: Understanding Ferrock.
Ferrock is an innovative material made using recycled steel dust and other sustainable materials, which is considered an alternative to cement-based concrete. It is strong, flexible, and environmentally friendly, making it a viable option for construction.
Step 2: Analyzing the options.
(A) Mycelium: Mycelium is a fungus-based material used for sustainable construction, but it is not an iron-based compound like Ferrock.
(B) Ferrock: Correct — Ferrock is an iron-based compound, and it serves as a more sustainable alternative to cement concrete.
(C) Bamboo: Bamboo is a strong and sustainable material, but it is not iron-based and does not serve as a direct alternative to concrete.
(D) Fiberglass: Fiberglass is a material used for different purposes, such as insulation and reinforcement, but it is not an alternative to cement concrete.
Step 3: Conclusion.
The correct answer is (B) Ferrock, as it is an iron-based alternative to cement concrete.