それは、人間が哺乳動物であることに由来しています。

Sentence Analyzer

English Translation

That is because human beings are mammals.

Furigana

それは、人間(にんげん)が哺乳(ほにゅう)動物(どうぶつ)であることに由来(ゆらい)しています。

Romanji

Sore wa, ningen ga honyū dōbutsu de aru koto ni yuraishiteimasu.

Words

其れ (それ)

that (indicating an item or person near the listener, the action of the listener, or something on their mind); it; that time; then; there (indicating a place near the listener); you

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

人間 (にんげん)

human being; person; man; mankind; humankind; character (of a person)

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

哺乳 (ほにゅう)

lactation; suckling; mammal

動物 (どうぶつ)

animal

だ (だ)

be; is; indicates past or completed action; indicates light imperative

或 (ある)

a certain ...; some ...

事 (こと、こん)

thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as

に (に)

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

由来 (ゆらい)

origin; source; history; derivation; reason; destiny