Answer:
There's additional information which helps better answer this question:
Which of the following properties of Pluto would best help answer this question?
<em>A.</em><em> surface temperature </em><em>B.</em><em> composition </em><em>C.</em><em> apparent brightness </em>
<em> </em><em>D.</em><em> color </em><em>E.</em><em> orbital period</em>
Pluto is kind of a mixture of Rock and water ice, with a 70% rock and the rest water ice, estimated that the 70% rock part is its core and the other 30% would be its mantle consisting of water ice and other gases such as nitrogen, carbon monoxide and methane; it is part of the Kuiper belt and it's considered a dwarf planet due it orbits the Sun and it's bigger than other asteroids and comets to be a dwarf, but not big enough to be a regular planet. Comets are generally more fragile than big asteroids and dwarf planets such as Pluto, their composition make them different objects due cometary nuclei is more like a blend of dust, some roks, water ice and some other gases, they're maily icy dirt balls.
Thus is mostly Pluto's composition which differ it from comets, therefore the best option would be: <em>B.</em><em>Composition</em>
Explanation:

The <u>Khyber Pass</u> is in what is today Khyber Pakhtunkhwa province (formerly known as the North West Frontier Province) of Pakistan, near the city of Peshawar. It is a border region. What is the neighboring nation? (This map will help you.) The Khyber Pass is on Pakistan's border with Afghanistan.
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It is impossible to build a drainage system on the outside of the Sao Francisco river as buildings are built on the outside of the foundation.
The Subarnarekha is developing a small drainage system.
The Amazon basin is the largest drainage basin in the world.
The Urugay drainage system includes the greater part of southeastern Brazil, Paraguay, southeastern Bolivia and northern Argentina
So i would suggest putting the Amazon as it is the most common known and largest. Remember to use geographical terms!