The superficial change in a system which itself stays invariant is termed <u>First-order</u> while the basic change in the structure of a system is called a <u>second-order</u>.
<h3>What is a
change?</h3>
This refers to any consistent trend in the environment that affects a substantial part of the globe.
However, the First-order is used when for the superficial change in a system and the Second-order is used for the basic change in the structure of a system.
Therefore, the "First-order" and "Second-order" are the respective answers.
Read more about change
<em>brainly.com/question/25594630</em>
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Partial lunar eclipse, hope this helps:)
Answer:
a. Barricade the area or position a worker in front of the ladder.
Explanation:
When one is using a ladder which has to be placed against the building on the sidewalk, the precaution used must be (from the four options) :-
<u>a. Barricade the area or position a worker in front of the ladder.</u>
This is because the area in which the worker is putting the latter is the prone are where the worker or the ladder might hit the pedestrian or any thing which can cause harm to the nature and mankind and that's why, the area must be blocked or defended with an improvised barrier.
