In which cases are pronouns ambigious and hence incorrect?

Test Preparation SAT Preparation
1

<p>There are couple of sat questions where I thought the pronoun was ambigious but that didnot turn out to be ambigious.
Though two nouns are preceeding the pronoun, why are not these ambigious.</p>

<p>1) Biologists which (this which is incorrect but continue) have studied coyotes claim that living in packs enables the animals to defend their (note this their) food supplies against marauders.<br>
In this case, which is obviously incorrrect but why is not "their" incorrect. i.e. their can refer to biologists and animals both. There are many such cases in SAT questions where the "their" can refer to two nouns but is not considered incorrect.</p>

2

<p>Which is incorrect because it should read “who.” That/which = inanimate/non-humans. Who = humans.</p>

<p>The “their” in not ambiguous because it is obvious that it is animals who live in packs, not biologists. Ambiguity is not so much a grammatical as a logical error, always remember that.</p>

3

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Now, I got the point.</p>