According to darwin’s theory of natural selection, individuals who survive are the ones best adapted for their environment. their survival is due to the

Those individuals survive which are the best ones and are adapted to their environment. Their survival is due to the possession Of adaptations.

Explanation:

Those organisms which are survive in the harsh environment, it is mainly due to some adaptations which helps them to survive in an environmental condition which are not suitable for them and those organisms are removed from the environment which have no adaptations capabilities.

that is wrong, its not thymus.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.