surveillance
A group of closely related classes in a kingdom is called a phylum. It is a taxonomic rank below kingdom and above class.
"Eye ball you" typically means to look at someone closely or to observe them carefully. It can also imply a subtle form of evaluation or assessment.
The beetle that closely resembles an ant in appearance is called a "velvet ant" or "cow killer ant."
Primary oocyte is surrounded by flattened epithelial cells called follicular cells.
A group of molecules squeezed together is called a solid. In a solid, the molecules are closely packed and have fixed positions relative to each other.
The security guard remained watchful throughout the night, ensuring the safety of the premises.
Observe
Homographs are words that are spelled the same but have different meanings. To observe closely can mean to view something carefully or to pay close attention to details.
To overlook or observe closely
The homograph for "to observe closely" is "watch," while the homograph for "a timepiece" is also "watch." The meaning is differentiated by context in which the word is used.
Vivid verbs for observe closely study, peer, stare, consider, absorb, soak up, to count every detail, etc... have fun choosing.
watchful waiting
zoom in closely at their faces and body
The word watch can be a noun and a verb. The noun is a device that tells the time worn on the wrist. The verb form means to observe.
Observing means attentive, watchful, and looking on. The definition of comparing is, to regard as similar or to examine in order to observe or discover similarities or differences.
Watchful was created in 1997.
There are several: examine, study, assay, investigate.