The expression "her heart was throbbing" implies that her heart was ultimately beating or pounding. It is to beat rapidly or violently. In simpler words, it just means that her heart was beating fast due to an emotional outburst. Hope this answers your question. Have a great day!
An exclamatory sentence always ends in C) An exclamation point. This is because you are crying out a loud voice, emphatic expression or a vociferation.
How was your summer? Mine went great, here are some things that I did in the summer.(briefly list