Ответы
1.
1. Invention is a new thing that someone has made accidentally or purposefully.
2. Discovery is something which exists in this world but someone is the first to bring it to public attention as something which no one knew about before.
3. Plagiarism is the "wrongful appropriation" and "stealing and publication" of another author's "language, thoughts, ideas, or expressions" and the representation of them as one's own original work.
(or)
Plagiarism is the illegal use or disposal of the protected results of someone else's creative work, which is accompanied by bringing to others false information about yourself as a real author.
4. Enthusiasm is a positively colored emotion, a state of inspiration, and the Commission of active actions to achieve certain goals under the influence of this mood.
(or)
Enthusiasm is intense enjoyment, interest, or approval.
9. Plagiarism means stealing someone else's creative ideas and their incarnations and passing them off as your own.
Citing sources is a reference to the words of someone else with an indication of the author in order to give an example or opinion of someone other than the one who is citing.
;)