Ideas for Climate-Friendly Food Production

thank you. How we pronounce word (with) th if followed by consonant (voiced an voiceless) or vowel like (With you) -- (With me) - Without the word ^with^ and i think the word ^with^ if followed by voiceless sound became ? as in thanks the ^th^ same sound for example with children. but the word ^with^ if followed by voiced ? as in those or that for example with me how? can say (with) at the and of sentence or in american English always voiceless sound became ? as in thanks