mdacosta wrote:
for #2, I don't understand why 'those' is redundant or incorrect. i read option C to say:
"helping them to distinguish their own species from those (species) of others"
meaning, helps them decipher their type of bat from everyone else (not just other bats)
In Option C, "those" refers to "species" - so does "others" - hence the redundancy. Option C is thus as follows:
"...helping them to distinguish their own species from those (species) of others
...
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