Question of the Day 
 
The following question has a paragraph from which the last sentence has been deleted. From the given options, choose the one that completes the paragraph in the most appropriate way.
 

Life is a self-renewing process through action upon the environment. In all the higher forms this process cannot be kept up indefinitely. After a while they succumb; they die. ________.
OPTIONS
 
 1)As some species die out, forms better adapted to utilize the obstacles against which they struggled in vain come into being.
 2)The creature is not equal to the task of indefinite self-renewal.
 3)But continuity of the life process is not dependent upon the prolongation of the existence of any one individual.
 4)Reproduction of other forms of life goes on in continuous sequence.
 5)And though, as the geological record shows, not merely individuals but also species die out, the life process continues in increasingly complex forms.