yes
An elephant's tusk is like a spear is an example of simile.
you need to tell us what 'it' is
A simile.
A metaphor
The US is bordered by Mexico and Canada. Canada is bordered by the US.
As quick as a wink is a simile. ----
It is a simile.
One simile in the poem "If" by Rudyard Kipling is the line "If you can meet with Triumph and Disaster \ And treat those two impostors just the same". This simile compares Triumph and Disaster to impostors, suggesting that they can deceive or mislead us.
A Simile uses Like or AS - it's the part where they say "Like A ____"
No, the US is south of Canada.
Maryland is in the US not in Canada.