Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'ice core'?

A. The extensive central cratons of continents may consist of both shields and platforms, and the crystalline basement. A platform is that part of the craton for which the basement is overlain by horizontal or subhorizontal sediments. [Wikipedia]
B. the concept is an important step in the reproduction of seed plants: the transfer of pollen grains (male gametes) to the plant carpel, the structure that contains the ovule (female gamete). The receptive part of the carpel is called a stigma in the flowers of angiosperms and a micropyle in gymnosperms. The study of the concept brings together many disciplines, such as botany, horticulture, entomology, and ecology. the concept is important in horticulture because most plant fruits will not develop if the ovules are not fertilized. The the concept process as interaction between flower and vector was first addressed in the 18th century by Christian Konrad Sprengel.
C. An the concept is an ion that has more electrons than protons such that the atom or molecule is negatively charged. [Wikipedia]
D. The composition of an the concept can be used to reconstruct past climates and climate change; typically removed from an ice sheet (Antarctica and Greenland) or from high mountain glaciers elsewhere.

Answer: The composition of an the concept can be used to reconstruct past climates and climate change; typically removed from an ice sheet (Antarctica and Greenland) or from high mountain glaciers elsewhere.