[Grammar] essential to/for

[Shad]

Dear Teachers,
I have a little confusion on the used preposition here in the statement made by British PM Mr. Camroon when president Obama was on a state visit to the UK
" ..relations are essential to our security. Why did he not use ... for our security.

Thank you
SHad

 

[Raymott]

Dear Teachers,
I have a little confusion on the used preposition here in the statement made by British PM Mr. Camroon when president Obama was on a state visit to the UK
" ..relations are essential to our security. Why did he not use ... for our security.

Thank you
SHad

He could have used either. You'd have to ask him why he chose "to".