For Donald Super, a second-year college student who declares an academic major and starts searching for an internship related to her/his academic major would mostly be in which substage?

The following is missing for the question to be complete:

Crystallisation of preference

Advancement

Establishment

Trial of preference

   Crystallisation of preference

Explanation:  The crystallisation of preferences refers to a certain clarity of what one wants to achieve, which is aspired to be future careers. This would be an ability to determine and separate "what I am" from "what I am not". It is not yet about taking up a job position and building a career, it is about knowing what our career will be, and accordingly Donald Super is beginning to seek the right internship for his future career.

All other terms are related to a job i.e career, namely: trial of preference is the period of starting a job, i.e trying a chosen job. The result of this trial may be the growth or weakening of the ambition for the job. This sub stage is after crystallisation. If a trial period dampens the ambition for the chosen job, the crystallisation process can be repeated and initially opted for another job. It can last from 22 to 24 years of age.

Establishment is the occupation of a job position that is finally selected and this period lasts from 25 to 44 years. This means investing efforts to take the appropriate place in the job you want. That position implies a convenient position for further advancement while securing a starting position.

Advancement is a second sub stage as a part of the Establishment stage and follows the Trial with commitment., which is the first sub stage of the Establishment stage. Advancement lasts from 31 to 44 years of life, and after the initial securing of the position and stabilisation in the position, which takes place in a trill with commitment sub stage, in this sub stage it moves further towards progress, that means after material, financial self-secure, it moves towards some challenges, i.e improvement and advancement.

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.

c. reserves power to the states and people