Which of the following is created when the ice of a comet starts to melt into gases?

You haven't put up the options to go with the question, but anything along the lines of 'tail' works.

When the ice begins to sublime (change to gases) these gases form a tail like shape away from the comet.

When the ice of a comet starts to melt into gases, it forms what is known as a coma.

To find this answer on your own, you can use reliable sources like astronomy textbooks, scientific journals, or educational websites that provide information about comets. These sources often explain the formation and composition of comets, including the process by which comet ice melts into gases. By reading up on these resources, you can gain a broader understanding of comets and their characteristics.