spring noun

1. a source of water coming from the ground
2. a time or season of growth
3. a device that recovers its original shape after being used
4. the act or an instance of leaping up or forward

which dictionary definition of "spring" is used in the following sentence?

the spring was a great resource when we went camping for a week in the mountains.
a) definition 1
b) definition 2
c) definition 3
d) definition 4