Invasive species can enter a habitat in many ways. how were these invasive species introduced?

1.intentional introduction
2.unintentional introduction
3.loss of habitat

a. a species of rats entered a habitat stowed away in a train.

b. a man added invasive water hyacinths to beautify his private lake.

c. a flood prompted many aquatic species to inhabit a new area.

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct