The is a measure of how acidic or basic a solution is.

The correct answer is pH.

Explanation:

The pH is a measure that is used to determine the acidity or alkalinity of a substance.

Its acronym is for hydrogen potential or hydrogenation potential.

It can be measured through a potentiometer or pH meter, which measures the potential difference between reference electrodes and glass electrodes that are sensitive to hydrogen ion.

It is a very important procedure and widely used in chemistry and biochemistry, since it determines many significant characteristics of the structure and activity of the molecules.

the answer is:

c. islam and christianity

explanation:

islam and christianity are widely practiced in africa. islam is practiced due to its spread from the middle east into africa, and christianity is practiced due to the colonization of africa by the british empire.

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì