The meaning of the word exude?​

exude

/ɪɡˈzjuːd,ɛɡˈzjuːd/  

verb

1.  (with reference to moisture or a smell) discharge or be discharged slowly and steadily.

"the beetle exudes a caustic liquid"

Similar:

give off/out

discharge

release

send out

send forth

emit

Opposite:

absorb

take up

2.

(of a person) display (an emotion or quality) strongly and openly.

"Sir Thomas exuded goodwill"

Similar:

emanate

radiate

ooze

give out

give forth

send out

issue

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.

3 is blunder, i’m not sure about the last one but the first two look correct