introduced species

an ecosystem (system of an ecological community and its environment)

possibility; probability; likelihood

a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

destroy / disturb an erect posture / change money into smaller denominations, break a bill

(judo) unbalancing an opponent

being foreign / outpatient

balance (condition of a system in which competing influences are balanced)

to be balanced

possible / feasible