Question

basic requirement of sincerity is uniformity in and _____action​

Answer 1

Explanation:

The given statement states that the quality of sincerity is been said as uniformity in and on action.

Reason
There is a requirement for prepositions and the preposition words are used before the nouns to introduce the object.
Here, describing the nature of the word uniformity by using - in and on as prepositions.

Answer 2

Basic requirement of sincerity is uniformity in and on action (on is the right answer)

• Prepositions like in and on are used to describe location, among other things. There are a few simple guidelines to follow when deciding between in and on for location, though there are always exceptions. One of the exclusions is the phrase "riding on the bus," which you asked about. But first, let's go over the regulations.
• ON When something is in contact with the surface of something, use on. It could be a horizontal surface such as a floor or a vertical surface such as a wall ("They put pictures ON the wall"). We also say "on" when referring to the surface of body parts ("He has a tattoo ON his arm").

• Examining the two sentences below can help you comprehend the difference between in and on. The use of in in the first one indicates that the person is laying beneath the blankets on the bed, between the sheets.
• The word on is used in the second sentence to indicate that the book is on the bed's surface, not under the covers.

Hence, Basic requirement of sincerity is uniformity in and on action.

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