Read the following paragraph. [1] Keeping my mind on my writing is not easy when I stay at my grandmother's ocean-side cottage. [2] Just about the time that I am going along pretty well, I glance out the window and see two huge bald eagles swooping and tumbling in a spectacular aerial display. [3] Naturally, I have to leave my desk and rush to the doorway to watch the performance as long as it lasts. [4] Then, as if a conspiracy were trying to keep me from working, two otters poke their shiny heads out of the water and hang there motionless. [5] They watch to see what I am doing. [6] As soon as I return to my desk, seagulls wheel into my window view and screech as they search for scraps of food. [7] Within minutes, this confusion of sounds stirs my aging St. Bernard out of a deep sleep, and he hauls his massive, lumbering body over to be petted. [8] Mickey, my cat, can't stand to see any pa tiality, so he is soon pacing back and forth across my ankles. [9] As I wiggle my bare toes to tease Mickey, I relize that my legs have become stiff. [10] I remember that I have not had my daily ride. [11] So, I slip on my sandals, step out the door, spring onto my bike, and pedal off down the beach. [12] Meanwhile, the composition in my typewriter sits and grows colder. What is the topic sentence?