Here's a clearer rendering;
Make stylistic corrections in the text. Explain why the replacement of nouns and adjectives with pronouns is possible or necessary. A large winged walnut occupied a half-yard. The nut was planted by the owner of the estate. The owner was proud of the nut and gladly gave advice on how to plant a nut. The owner talked about how clean the walnut is, that the walnut cleans the air. And under the walnut there is a rest area: a dug-in table, benches. The table and benches were made by the owner. The host often worked on the table. Everything went well for the owner.
Answer:
The owner, The nut, which is a noun appears to often.
Explanation:
The corrected passage could read this way;
A large winged walnut occupied a half-yard. It was planted by the owner of the estate who was proud of the nut and gladly gave advice on how to plant a nut.
He talked about how clean the walnut is, and that it cleans the air, under it there's a rest area: a dug-in table, benches, which were made by him. The host often worked on the table and everything went well for him.
