Animals-

Question 1

のど袋 （のどぶくろ）

Answer 1

(Noun)

dewlap; gular pouch​

Question 2

いそうろうぐも （居候蜘蛛）

Answer 2

(Noun)
dewdrop spider (any spider of genus Argyrodes)​ (Usually written using kana alone)

Question 3

巣 （す）

Answer 3

(Noun)

1. nest; rookery; breeding place; hive​
2. den​
3. haunt​
4. (spider’s) web​ (See also 蜘蛛の巣)

Question 4

巣食う （すくう）

Answer 4

(Godan verb with u ending, intransitive verb)

1. to build (a nest); to nest​
2. to haunt (a place); to hang out (somewhere)​

嫉妬心(しっとしん)くらい強く(つよく)人間(にんげん)の心情(しんじょう)に○情熱(じょうねつ)はない。
There is not a passion so strongly rooted in the human heart as envy.