Final answer:
Among the expected behavior characteristics in toddlers, developing a sense of autonomy is key, as they exhibit a desire to make choices and perform tasks independently. Cooperative play with peers, understanding abstract concepts, and verbalizing complex sentences develop later as the child grows.
Step-by-step explanation:
When guiding a parent of a toddler, a nurse must emphasize several behavior characteristics typical of this developmental stage. Among these, the most significant is developing a sense of autonomy. This phase, often referred to as the "me do it" stage, is crucial for toddlers as they work to establish independence. Toddlers exhibit a desire to make simple choices, perform tasks on their own, and express their individuality. While a toddler's sense of autonomy is blossoming, their ability to participate in cooperative play with peers does not typically develop until around 4 years of age, and their understanding of abstract concepts is also not yet refined. Moreover, verbalizing complex sentences is generally beyond the capacity of toddlers and may be observed as their language skills progress with age.