IGCSE Biology question

hey friends! I am currently studying IG bio right now, and I am confusing to this question below:

https://pmt.physicsandmathstutor.com/download/Biology/GCSE/Past-Papers/CIE/Paper-2/March%202017%20(v2)%20QP%20-%20Paper%202%20CIE%20Biology%20IGCSE.pdf

Multiple choice question No.2
The diagram shows how a seed changes after it is planted in soil and watered.
and I find out the correct answer is B growth and sensitivity
but I feel according to the picture, option A excretion and growth might also be right, cause the last picture shows the seed coat has been excreted. if I am wrong, then how should I describe the process of removing seed coat?
Thank you!

There are 2 elements
Excretion - removal of metabolic waste, such as CO2, nitrogenous compounds. This is not visible
Growth - which is shown in the diagram
See: https://www.toppr.com/ask/en-gb/question/to-remove-seed-dormancy-by-mechanically-removing-theseed-coat-is-called/#