Life Spans...Why are they all different?

Why do you suppose an oak tree's typical life span is three hundred years?  A butterfly's life is typically only two weeks long. The average human lives about seventy-five years .

A live oak tree grows for one hundred years to maturity. During it's second hundred years it lives as an adult. After it's two hundredth birthday it begins the dying process. The limbs begin to grow heavy causing them to droop. As the three hundredth year approaches the limbs touch and finally begin to grow into the ground. After it has burired some of it's own limbs in the soil, new Live Oak shoots appear. Once the new trees begin it is time for the old tree to die.

Human beings mature to the stage of adulthood usually around the age of twenty. Somewhere between the ages of twenty to forty-two they typically produce children. By the time we reach our fifties aging bodies begin the struggle of survival. Generally some form of disease begins in the mid fifty to late sixty year mark. Finally, the diseased human scums to death.

Then there's the beautiful butterfly. After it emerges from it's cocoon, it only lives about two glorious weeks.But in it's short life it soars over plants and trees, as if to say," Look at me; I'm as beautiful as I can be!" How boring our lives would be in the summertime without God's added beauty, grace and freedom we gleen from the butterflies.

 Why does God give all creatures different life spans? There must be a purpose, what is it?

"To everything there is a season,
A time for every purpose under heaven:" Ecclesiastes 3:1 (NKJV)

⁹ What profit has the worker from that in which he labors? ¹⁰ I have seen the God-given task with which the sons of men are to be occupied. ¹¹ He has made everything beautiful in its time. Also He has put eternity in their hearts, except that no one can find out the work that God does from beginning to end.

¹² I know that nothing is better for them than to rejoice, and to do good in their lives, ¹³ and also that every man should eat and drink and enjoy the good of all his labor—it is the gift of God.

¹⁴ I know that whatever God does,
It shall be forever.
Nothing can be added to it,And nothing taken from it.
God does it, that men should fear before Him.
¹⁵ That which is has already been,
And what is to be has already been;And God requires an account of what is past.     Ecclesiastes 3:9-15 (NKJV)²

^" He has made the earth by His power,
He has established the world by His wisdom,
And has stretched out the heavens at His discretion.¹³ When He utters His voice,
There is a multitude of waters in the heavens:
“And He causes the vapors to ascend from the ends of the earth.
He makes lightning for the rain,He brings the wind out of His treasuries.”      ^{Jeremiah 10:12-13 (NKJV)}

 ^{I would love to know your thoughts. Leave me a comment, Thank you.}