Why -OH group in phenol is ortho and para directing in nature ?

Haloarene is ortho and para directing Explain.

Why is aldehydes group in benzaldehyde meta directing in nature ?

Explain ortho and para hydrogens.

Ortho and para hydrogen differ

Why phenols are acidic in nature ?

Alkenes are reactive in nature, why ?

Why nitration of phenol gives only ortho and para products ?

Although chlorine is an electron withdrawing group, yet it is ortho-, para-directing in electrophilic aromatic substitution reactions. Why ?