1) what characteristics increase the likelihood that a nonnative species will become an invasive species? 2) what conditions in an ecosystem are likely to allow a species to become invasive there? 3) biological control involves the introduction of a natural enemy to control the spread of an organism that is considered a pest. what are the trade-offs in introducing a nonnative species to control an established invasive species?

1. The non-native species are considered to be invasive only when they cause harm. Some of the features that increase the possibility of a non-native species in becoming an invasive species are they reproduce easily, they are habitat generalist, they out-competes other plant species, possesses the tendency to produce abundant seeds, and are not influenced by the native diseases and pests.  

2. If an ecosystem were identical to the local ecosystem of a species, it would possibly be easier for the species to invade. For example, if the species is found in a novel location, which is the identical biome as its local ecosystem, then it is probably more common to turn into an invasive species.  

3. The introduction of a non-native species to monitor the invasive species does not always work. However, even if it works, the other native species could also get influenced adversely. If the population of the introduced species enhances too much, it can result in competition for space and food with the native species. The non-native species may also result in the introduction of diseases, which might kill or harm the local species.