Question

What does it mean to have negative tone and negative diction vs. having positive tone and positive diction?

Answer 1

"Tone" suggests an attitude in the person expressing it. "Diction" refers the actual words used (lexical meaning). See the examples below.

Explanation:

'You should not be lounging on the grass" - negative tone
'A lawn is not for relaxation' - negative diction.
'You may find that the benches under the trees provide a comfortable place for relaxation' - positive tone
'Benches are provided for students during breaks.' - positive way of expressing theidea.