What are the changes seen in girls at the time of puberty

Increase in the chest size. The appearance of hair in other areas of skin like underarms, face, hands, and legs. Increase in the size of the uterus and ovary.

substitution is the answer in this case

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.