Shrublands are often referred to as scrub or scrubland. Why do you think the authors decided to use the term shrubland instead? Do you agree or disagree with their choice ?

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hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

idk about that one.