Answer:
Decrease
Step-by-step explanation:
A catalyst increases the speed of a chemical reaction. To do this, the catalyst must decrease the activation energy required in a reaction. The lowered activation energy means that the reaction requires less energy to begin, thus increasing the speed.
Imagine it like filling a bucket with drops of water. A bucket of water takes a long time to fill up with drops. Imagine that a catalyst is a basketball. Placing the basketball into the bucket before filling it with water drops will decrease the amount of time it takes to fill the bucket.
