A Highly Toxic Substance Now Being Used to Extract Gold

question 56

Multiple Choice

A highly toxic substance now being used to extract gold from low-grade ore is:

• A)arsenic.
• B)mercury.
• C)cyanide.
• D)sodium.

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Definitions:

Babbling

A stage in child language acquisition where infants produce sounds before they learn to speak actual words, often combining consonants and vowels like "baba" or "gaga".

Cooing

The early vocalization of infants that consists of soft, throaty noises, often made in response to social interaction.

Intonation

The variation of pitch while speaking, which can affect the meaning of words and convey emotion or emphasis.

First Word

The initial stage of verbal expression in infants, marking the beginning of spoken language acquisition.