2. All living things have complex relationships with -species and with their environment. A) the others. B) other C) others D) the one E) another

## Step 1<br />The problem is a multiple-choice question that tests your understanding of English grammar, specifically the use of pronouns. The sentence given is "All living things have complex relationships with -species and with their environment."<br /><br />## Step 2<br />The sentence is missing a pronoun that refers to 'pecies'. The correct pronoun should be 'other' because it is used to refer to another species.<br /><br />## Step 3<br />Looking, we can see that 'the others' is a plural form and 'the one' is singular, which does not fit the context of the sentence. 'Another' is also singular and does not fit the context of the sentence.<br /><br />## Step 4<br />Therefore, the correct answer is 'other', which is option B.