Zastrow and Kirst-Ashman (2016) stated, “We need theories to guide our thinking and our work so that we may undertake research-informed practice” (p. 127-128). At the same time, the authors asserted, “No theory will be perfectly applicable. Perhaps you will decide that only one or two concepts make any sense to you in terms of working with clients” (p. 128). Though you may be able to apply only a few concepts in a particular theory to your work with clients, as a social worker, you should be applying evidence-based research to your work. Empirically-based developmental theories may guide you as you assess clients and their presenting problems. You may also apply developmental theories to your treatment decisions.For this Assignment, you discuss theories of life-span development by evaluating a theory that seems especially relevant to you and your role as a social worker. Select a theory of life-span development to address in this Discussion. This may be a theory described in the resources of this course, or you may select a theory based on personal research. Locate at least one scholarly resource (not included in the course resources) that addresses the theory you selected.By Day 3Post a Discussion in which you analyze the theory of life-span development that you selected. Summarize the theory; then, identify the strengths and weaknesses of this theory, especially as it relates to social work practice. Explain one way you might apply the theory to your social work practice.