Answer:
Perform a preliminary strand test 
Explanation:
Subject to the application of hair treatment or intended alteration of hair color or properties, a preliminary hair strand test may be performed in other to examine and establish if the hair in question is suitable for the process. The preliminary strand test will give insight and idea about the possible result of the intended process, and the stylist will be able to infer if the hair is suitable to undergo such process or not. Hair stragd test may be necessary prior to relaxer application, hair color change and so on. 
 
        
             
        
        
        
The proportion of eligible adult citizens who vote in a given election is referred to as. Turnout at the polls.
An hour before polling stations closed at 5 p.m., the electoral commission reported a voter turnout of 12,065,803, or 56.17% of registered voters.Voter turnout is an important statistic that shows how involved voters were in a particular election. In general, this is the percentage of voters who vote in a given election, and it is calculated by dividing the number of votes by the number of voters. The paradox of voting, also known as Downs' paradox, states that the costs of voting usually outweigh the expected benefits for a rational, self-interested voter.
Learn more about turnout here:
brainly.com/question/1270103
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Answer:
testing effect
Explanation:
Testing effect: The term testing effect refers to the process of a person's memory and learning being facilitated or stimulated through the incorporation of the rehearsal or practice test in the person's learning regime. It talks about the process of retrieval that has a great implication on the memory or learning of a person.
Testing effect has a great impact on the end result of an individual's test being taken many times.
Example: A multiple attempts to any competitive exam leads a person to get better results than before as it can increase the score.
In the question above, the change in performance may best account for the testing effect.