\begin{document}$R_{\rm AA}$\end{document}, modification of jet shape observable \begin{document}$ \rho(r) $\end{document} and jet fragmentation (\begin{document}$ z^{\rm ch} $\end{document}) distributions, etc. In this work, we study \begin{document}$ \rho(r) $\end{document} and \begin{document}$ z^{\rm ch} $\end{document} for inclusive charged-particle jets in proton-proton (pp) collisions at \begin{document}$ \sqrt{s} $\end{document} = 13 TeV using the PYTHIA 8 Monash 2013 Monte Carlo simulation. We show that the color reconnection (CR) and multiparton interaction (MPI) mechanisms in PYTHIA 8 can lead to an increased rate of jet production. We also find that the mechanisms of MPI and CR and change in the gluonic contribution in high-multiplicity events result in significant modification of \begin{document}$ \rho(r) $\end{document} and \begin{document}$ z^{\rm ch} $\end{document} compared to those in minimum bias events for 10 \begin{document}$ < p_{\rm T,\,jet}^{\rm ch}< $\end{document} 20 GeV/c. We notice a direct connection of \begin{document}$ \langle N_{\rm MPI}\rangle $\end{document} and gluonic contribution with the amount of modification in \begin{document}$ \rho(r) $\end{document}: the larger the number of MPIs and/or gluonic contribution, the larger the amount of modification of \begin{document}$ \rho(r) $\end{document}."> Jet modification in absence of QGP-medium: the role of multiparton interactions and color reconnection -
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