In Passage 1, what can be understood from Lou's
argument at the bottom of page 3?

Lou's argument stems from this:

He wants to avoid hard work.

Lou's elder sister, Alexandra succeeds their father on the land.  And Alexandra proves that hard work pays eventually.  In accordance with the promise she made on her father's dying bed, to look after her siblings and also decide the best use of the land, she persevered until the land became fruitful and was able to enrich the family.  Unlike her younger brother, Lou, who wanted to sell off the land to a land speculator, Alexandra would not be swayed to sell off the land.  She understood that in cultivating the land with tenderness, the land's fruitfulness was enriched.  In the same manner, the fruitfulness of a relationship becomes prominent and enriched when the relationship is cultivated.

Explanation:

O Pioneers! a 1913 novel by Willa Cather was written to extol "the strength and everlasting nature of the land and the ugly and destructive nature of jealousy."  It narrated the lives and experiences of the Bergsons who immigrated from Sweden to Nebraska, US.  At first, their father acquired a massive parcel of land for farming and started cultivating it to sustain the family of Alexandra, Oscar, Lou, Emily, and their mother.  When he died, Alexandra took charge of the land and turned their agricultural activities into a lucrative business that continued to sustain the family and pay for their family needs.

you need need more details so we can understand what your asking us.

the legal limit for the drivers who can drive after consuming any amount of alcohol is 21 years.

explanation:

on november 1, 1996, a "zero tolerance law" was put into effect in the new york state.

according to this zero tolerance law, for people under the age of 21 years, it was illegal to purchase and possess alcohol or to drive after consuming any amount of it.

also, the alcohol involvement rate for the drivers under the age of 21 was roughly twice that of elderly drivers.