I believe it is the last choice
In late adulthood, changes in memory may not be inevitable; however, any decline in memory tends to involve episodic memory. Episodic memory is the memory of autobiographical events such as time, places, associated emotions, and other contextual who, when, what, where, why knowledge, that can be explicitly stated or conjured. It is the collection of past personal experiences that occurred at a particular time and place. Examples of episodic memory include, the memories of what you ate for breakfast, your first day of college.
The best answer to this would be Proterozoic (although it actually lasted a little less than half by estimates, but it's the longest period.)
It started around 2500 million years ago and lasted till 500 million years ago- 2000 million years long. The estimated age of Earth is 4500 million years old -a little over twice this period
No because a chemical reaction that is at equilibrium in living cells is not capable of doing any work
A. Veins
B. <span>Arteries
C. </span><span>Capillaries</span>