Designing and constructing buildings that are energy efficient, economical, and made of recycled materials, is a trend called
a. friendly construction.
b. green architecture.
c. environmental building.
d. passive design.
e. ecology construction.

B.green architecture.

Explanation:

Green architecture or green design is a philosophy whose goal is to build buildings that minimize the harmful effects on the environment by using sustainable energy sources and using recycled materials and eco-friendly construction techniques.

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multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.