Question

a pipet, place a bulb or pump at the top of the pipet. use this object to fill the pipet such that the choose... even with the volume line. release the liquid, touching the tip of the pipet to the side of the container if n choose... t drop choose... the pipet tip. meniscus top

Explanation:

When using a pipet, to measure liquid volume accurately, we fill the pipet so that the meniscus (the curved surface of the liquid) is even with the volume line. The "top" of the liquid would not be the correct reference for accurate measurement; the meniscus is the standard point of reference in pipetting for volume measurement. For the last "Choose..." (about the drop at the pipet tip), typically, we do not blow out the last drop (if it's a volumetric pipet, the last drop is left as it's accounted for in the calibration), but based on the first dropdown's context (pipetting technique), the middle "Choose..." (the one with options meniscus and top) should be "meniscus" as that's the correct term for the liquid surface used in volume measurement with a pipet.

Answer:

For the middle "Choose..." (the one with options meniscus and top), the answer is meniscus.