Correct Answer: PQSR

Solution : The correct choice is the first option.

Explanation:

It is not uncommon
P. for parents and others in a particular animal
Q. group to teach their young through example how to
S. find food or water when it becomes scarce because
R . of drought or other environmental change
So, the flow of information begins with the statement about a usual occurrence (P), followed by the specific group engaged in the behaviour (Q), then explaining the reason behind their actions (S), and finally, offering the context or situations prompting this behaviour (R).

Therefore, the complete sentence would be: "It is not uncommon for parents and others in a particular animal group to teach their young through example how to find food or water when it becomes scarce because of drought or other environmental change."