This was simply a matter of survival.
She neede to pass the survival course to survive!
That survival instinct reaction was ingrained in me during my childhood.
Because he was trapped in the cave with no way out, he had to try to survive on little water and little food.
This is how... we were working for survival.
Water is vital for survival. i.e we need water to live.
Survival is important in the wild.
The wild animals search for food for their survival. Sorry, I will be attending a survival skills seminar that weekend.
I am taking a survival course this weekend, so please call me on Monday.
The beasts primal instincts dictated its behavior.
Plants convert sunlight into energy using photosynthesis.
Plants use photosynthesis to obtain energy to continue living. (or "for continued survival", etc.)
These tigers will now demonstrate what survival of the fittest really means.