Most people either stay with their religion of origin (the religion they were brought up in) or become agnostic (do not follow a religion). For those people for whom religion is of great importance they may switch religions because of theological differences with their current religion. In most cases where people convert, this is due to social reasons such as marriage or other changes in family arrangement. Changing faith for reasons other than personal convictions is known as secondary conversion. Some religions welcome newcomers for whatever reasons whereas other discourage secondary conversion.
People who change religion due to conviction of faith often due so because their current religion does not fulfill their theological needs. Perhaps it is contrary to aspects of their lifestyle etc. Most such conversions are usually between denominations rather than between actual religions, although these major jumps do happen.
Electrostatic Attraction is the force that attracts one ion to another.
To my knowledge ex-jehovah's Witnesses joint a multitude of other religions. Some choose not to joint another religion at all. I don't believe there is one specific religion that attracts more former Jehovah's Witnesses than another.
Gravity
I love my religion, Islam, because it teaches people should love one another.
proximity and valence electrons
One person's superstition is another person's religion.
Colors and scents.
Gravity is the force that attracts all objects toward one another. It is responsible for keeping celestial bodies in orbits and causing things to fall toward the Earth.
They might but a range of issues from language and literature, ecology and social justice has demanded--and received--his/her incessant attention. With remarkable innovation and dynamism, he/she has integrated these varied activities into Christianity, the faith of his/her choice, which he/she continues to practise.
Changing from one religion to another is called the same for any of them: conversion.
that we have to be helpful to one another
There is no absolute proof for or against religions. Until such proof emerges each have equal validity. This is of course no bar to people that have a faith in a particular religion.