1. a) predation is when one organism is harmed and the other is benefited. An example of this is when a predator eats/hunts its prey - like a lion eating a lamb
b) commensalism is when one organism benefits from the other and the second organism is not affected. An example of this are the barnicles on a whale
c) symbiosis is the long-term interaction between two different biological organisms
d) parasitism is when one organism is harmed while the other is benefited
The answer is An object is in motion if it changes position relative to a reference point. You assume that the reference point is stationary, or not moving.
The answer to your question is either drawbridge or scaffolding. I want to go with drawbridge because it has support and stands of for itself, so its similar to a stucture if that makes sense.
Answer:
I'm sorry but there is no picture above you-
