Answer:
Foreign/Exotic species
Explanation:
If you are talking about introduced, think of foreigners but as animals.
Food and water.
-protein
-carbohydrates
-fat
Cardiorepiratory insdurance is an aerobic fitness involving performing exercise at moderate level of intensity for an extended period.
Depend on what you mean by what kind of competition, if you talk about competition for food, some bird population may be getting smaller and have a hard time to reproduce because they can't get enough food for themselves.
