1. r-strategists are organisms that have a high reproductive rate and a short lifespan. They typically live in unstable or unpredictable environments, where the chances of survival are low.
2. K-strategists are organisms that have a low reproductive rate and a long lifespan. They typically live in stable or predictable environments, where the chances of survival are high.
3. r-K strategists are organisms that have intermediate reproductive rates and lifespans. They can adapt to a variety of environments, and are often opportunistic in their resource use.
Each survival strategy has its own advantages and disadvantages. r-strategists are able to quickly adapt to changing environments and produce a large number of offspring to ensure that some will survive. However, they are also more vulnerable to environmental changes and competition. K-strategists are able to live longer and invest more in their offspring, which increases their chances of survival. However, they are less adaptable to changing environments. r-K strategists are able to balance the advantages of both strategies, which allows them to be successful in a variety of environments.