Step 1: Recall what top level management is responsible for.
This includes formulating overall goals and strategy, being responsible for the welfare and survival of the whole organisation, and analysing the business environment for its impact on the firm.
Step 2: Check each option against this role.
Options covering goals, strategy, survival and environment analysis all fit squarely within the top level's job description.
Step 3: Look closely at the remaining option.
Cooperating with other departments for smooth functioning is a coordination task that middle level managers, who head individual departments, handle on a daily basis, not something top management is primarily tasked with.
Final answer: Option 1, Cooperating with other departments for smooth functioning of the organisation.