Extremely beneficial to those.
That is the correct spelling of immensely (extremely, very).
for those who are
The correct spelling is courtesy (politeness, or a beneficial accommodation).
That is the correct spelling of the plural noun "improvements" (beneficial changes, property development).
'Advantage'
Yes, extremely
Extremely is the correct spelling.
Extremely rich soil for farming.
The correct grammar is: "Are those correct?"
Industrial jobs are only beneficial to those who like that field. If you are not the person who like to work in the industrial field; then those jobs are not going to be beneficial and you will not prosper in that field.
The correct spelling of the adjective is "helpful" (beneficial).
The correct spelling is "extremely" (to a great extent).
That is the correct spelling of immensely (extremely, very).
The correct spelling is "extremely."
for those who are
The correct spelling is courtesy (politeness, or a beneficial accommodation).
Overseas jobs in government are extremely beneficial and not just to the government, but also to you. The opportunity to work overseas, explore the different areas and to learn more of the culture all are very beneficial.