Amy is experimenting to see how a truss (a type of support) can strengthen a bridge. Amy builds several models of bridges out of toothpicks. Each model has a different number of trusses.

Amy suspends each model between two desks. She then adds lead weights to each bridge, one-by-one, until the bridge breaks. In the chart below, Amy recorded how many lead weights each bridge held before breaking.
What is a valid conclusion that Amy can draw from her experiment?

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.