I would say that there is no other living thing on earth that can react to medical testing like animals can, for example, testing it on plants wouldn't do us any good. but if you tested it on animals and it changed their hair purple or something then you gained new information that with out testing would have been unknown.
if you have options then I can help more, since it says "would most weaken"
Ask the owner to unban you by writing him/her a sorry paragraph.
stairs :) i believe is your answer
Answer:
A building is any kind of structure that is mainly built with materials and is standing still
Explanation:
A building can be regarded as any kind of structure that is or was mainly built with materials and is standing in the ground. The materials can vary, such as sand, cement, iron, wood etc . A building also has different components, some of which includes Chimney, roof, decking, wall, floor etc.
There are different types of buildings, notably among them are
Residential building
Educational building
Institutional building and even
Assembly building.
Each of the above mentioned types of buildings differ from the other from little to a lot of differences.
Usually, an engineer is the one in charge of building a building
