Answer:
The meaning of the word pike in the sentence is:
B. definition 2
Step-by-step explanation:
"Pike," as used in the sentence, "Peta ploughed on to the top of the pike and planted the pennant (flag) of her party," means a mountain or hill having a peaked summit—used especially in place names. This is the second definition. "Pike" can also mean definitions 1, 3, or 4. But, as used in this sentence, "pike" refers to the tip of a hill. The mountaintop or hilltop is the only location where pennants can be planted.