If you walk out into the ocean, you will see that the land covered by ocean water slopes very slowly away from the coastline. this gently sloping land close to the shore is known as the continental shelf. further out from the shore, the drop of steepens as it descends to meet the deep ocean floor. this steeper portion of the sea floor is known as the continental slope. together, the continental shelf and the continental slope are a part of the

the answer is continental margin B)

Explanation:

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you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6