Foliation describes a metamorphic rock texture having apparent directional banding or striping, which might be caused from original layering of parent sedimentary rock or from intense, directional tectonic pressures exerted during high-grade metamorphism.

a. true
b. false

False

Explanation:

Foliation is defined as a kind of texture that develops in the rocks when the minerals are subjected to extreme pressure and temperature condition. This applied pressure forces the elongated and flat minerals to orient themselves in a preferred direction, appearing in the form of thin sheets.

This type of texture is observed in the high grade metamorphic rocks such as gneiss, schist and phyllite.

Thus, the above given statement is False.

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radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.