What are some possible causes for eyebrow loss? for example, the eyebrow hairs just continuously fall. they also come out even when i gently pass my finger on it?

The cause for this might be several conditions, including thyroid disease, severe stress or infection { Covid } along with alopecia areata { a specific hair loss often seen and treated by dermatologists }. Poor nutrition or certain meds may also be a factor. I suggest that you see your primary care or dermatologist for evaluation and the proper treatment.