Why does a computer need an operating system?

Jackson is a very smart little boy he can count to twenty and is only two years old. complete, run on sentence or comma splice

Although the account is in good standing at this point in time. is this sentence incomplete or complete?

Identify the following sentence as simple, compound, complex, or compound-complex. even though most people think of africa as a desert, zimbabwe has a hot, tropical climate, so mangoes, passion fruit, pineapples, and avocados grow well there. a. compound b. simple c. complex d. compound-complex