You're missing a mod. Minecraft Comes Alive also requires a support mod called Radix-core, which essentially helps it run. I don't know where you downloaded from, but here is the official site if you want to download it from there. http://www.radix-shock.com/mca--download.html
Recently I have came across a mod "Minecraft Comes Alive" (https://www.youtube.com/channel/UCWuMBAV3lvHSmuOg5ZrQVvg) link to video. So I installed it and I keep getting this message:
Forge Mod Loader has found a problem with your minecraft installation
The mods and versions listed below could not be found
radiocore : any
The file 'ForgeModLoader-client-0.log' contains more information
So I looked through and found nothing related to this. If someone can help me with this I would be so thankful.
Just in case I provided a screenshot:
2nd- That's What You Get For Download Something From Youtube
Radiocore It's A Core Mod (Mod Library) You Need To Go To OP And Download It