Every organism NEEDS 4 things to live.
1. Water. Self-explainable.
2. Food. It's an energy source.
3. Living Space. All organisms need space to obtain food and water.
4. Stable Internal Conditions. Organisms must be able to keep their body stable, even when outside conditions change. (Like System Regulation a.k.a. Regulation of body temperature.)
Everything else, is what certain species need to survive. But those 4 are the basics for all organisms. EVERY living thing needs these things.
Organisms with traits that allow them to adapt to changes in their environment, reproduce successfully, and outcompete other species are most likely to survive. These could include species with high genetic diversity, rapid reproduction rates, or specialized adaptations that make them better suited to changing conditions.
None that is a trick question because you can't survive without each one. I think you could survive without a reproductive system. It might not be a life worth living, but you'd survive.
Natural Selection
Yes. Most of the people impacted by Hurricane Dennis survived.
Creation of variation occurs in a species and help in the survival to species as the most suitable or favorable character pass next generation and under unfavorable condition only the most fit organism survive and help in continuation of the species.
Most survive by eating bugs like most bats.
No, most alpine areas are entirely too cold for most cacti to survive.
Most ermine eat food and drink water to survive.
Amphibians have a wide range of methods to survive. Most important is their ability to survive drought.
Most worms will survive in sand, but not all.
Most organisms tend to survive within a pH range of 6 to 8. Extremophiles, however, can survive in environments with more extreme pH levels.
THE CUSHION STAR SURVIVE BECAUSE THEY ARE THE MOST ABUNTANT INTERTIDAL SPECIES
you need oxygen to survive anywhere.. most definately on saturn!!
Most animals need food or nutrition to survive .
With enough warning and common sense, most people can survive a flood.
Oxygen
Most of them survived by luck