During quiet breathing:
only the internal intercostal muscles contract.
inspiration involves muscular contractions and expiration is passive.
inspiration is passive and expiration involves muscular contractions.
both inspiration and expiration are passive.
both inspiration and expiration involve muscular contractions

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."

artificial selection

explanation:

this occur when man select base on their intelligent

the correct answers are;

a. the rock was made from more than one type of material.

e. layers of hot liquids in the rock cooled and solidified at different temperatures.

these are the two options that are related to the statement given above.