Questions

The potable water is the water, which is tested and safe for drinking purpose and cooking preparations. The water is tested and purified in industries. So, the potable water is costly.

Hence, Access to potable water is most heavily limited by money.

An atom is composed of three subatomic particles. They are ::

1) Electron (-vely charged particle)

2) Proton (+vely charged particle)

3) Neutron (No charge particle)

Hence, Neutron is the subatomic particle which has no charge.

"The moon smiled at me" is the example of personification in the given options.

Personification is a technique in which we give objects human traits like emotions, gestures, speech,... by using metaphor. 

Here moon is an object which cannot smile but using metaphor sense, we gave that sense to it.

Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.

A devastating  series of earthquakes in 1906 ruined the city completely and its presence is a constant remainder of the past and a threat of repetition in future.

The main excretory organs of insects and spiders are Malpighian tubules.

"The reason for playing softly" is not a motive. Motives are the building blocks for large forms composed during the common practice period and, for some, beyond. Composers who used motives would include Beethoven, Mozart, Schubert, Mendelssohn and Brahms.