Kirsten is trying to remember events from her life as an 18-month-old. however, as hard as she might try, she has no conscious memory for anything that occurred before her third birthday. this is likely due to the fact that the in her brain was not fully developed at that age.

This is likely due to the fact that the hippocampus in her brain was NOT fully developed at that age.

Explanation:

The hippocampus is the part of the brain where explicit memories are formed. The hippocampus is not full developed when birth occurs and takes about two years in happening. An effect of this is infantile amnesia, which means that most people do not have explicit memories from the first couple years of life.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.