(n.) a person who takes care of a person, place, or thing
caretaker
(n.) the total number of plants, animals, or people living in a certain place
population
(v.) to know and understand the existence or importance of something
recognize
(n.) a member of your family connected by blood or marriage
relative
(n.) something valuable that is found in nature and is used by animals or humans, such as food, minerals, trees, water, etc.
resource
(n.) a thing that succeeds or works well
success
(v.) to stay alive or continue to exist
survive
(v.) to present a danger to
threaten
(v.) to continue on with great difficulty or effort
struggle
(adj.) causing or capable of causing damage or harm
harmful
(n.) the natural environment of an animal or plant
habitat
(adj.) at risk of becoming extinct
endangered
