Which of the following is an invertebrate

invertebrates are an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. they can be spiders crickets ya know

Explanation:

i would spend it with those i love the most.i would do whatever to make up for those i have hurt intentionally or unintentionally.i would in all possible ways try to comfort the ones who love me nd of all i would gather courage nd say sry to my best friend

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme