I cut off the snail’s antennae because I didn’t know its eyes are on the tips of them.
The angle of the touch is important with an antenna. Think about antennas. An ant's antenna wiggle around and move in different angles, touching things, to understand the world around them. Imagine their tiny bug antennas touching your arm to figure out who you are.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. しょく goes to しょっ.