Which is used in Japanese writing style these days?

Question:

which is used in Japanese writing style these days?

Katakana -
Hiragana -
Kanji -
Kana -

And can you give me a simple meaning of each (like what they are used for today)

Answer:

Kana is just the general term for Japanese writing, specifically hiragana and katakana. Hiragana, katakana, and kanji are all used to write Japanese and it's not unusual to see two or even all three in the same sentence. Most Japanese words are written in kanji, hiragana, or a combination of the two. Katakana is used mostly for foreign words, foreign names, for emphasis, or to look cool.