For biological drownings Biorender.com is excellent. Other free sites for attractive drowing i will suggest

Inkscape.org

Draw.io,

Microsoft Visio

Smartdrow.com

Gimp.org

I recommend to check this post:

https://www.researchgate.net/post/Can_anyone_recommend_a_good_and_free_tool_program_for_drawing_biological_diagrams

Following links may help you.

https://www.researchgate.net/post/What-is-the-best-drawing-computer-software-Graphics-in-biological-sciences

https://www.researchgate.net/post/Which-software-do-you-use-to-draw-a-schematic-model

https://www.reddit.com/r/Biochemistry/comments/9bvyk6/drawing_software_for_diagramsfigures/

https://www.quora.com/What-software-could-you-use-to-create-diagrams-of-biochemical-processes-software-resource-biology-science-technology-computer

thank you Kapila Asanga Dias for shearing these informative links

Hi Sudip

https://biorender.com/

https://mindthegraph.com/blog/graphical-abstract-for-elsevier/

Thank you Keyvan valizadeh rad