Cactus will only take up as much water as they need and no more.
The reason cactus cannot live in a rainforest is that they will rot easily if they do not stay dry most of the time. They grow in sandy, well drained soil where their roots have a chance to dry out completely between rains. Therefore, they have never needed to develop defenses against rot-producing organisms.
Most cactus also need lots of sunlight, a commodity hard to find on the rainforest floor.
the trees suck the water up so the water table doesn't rise
to suck up the water to store it
The Cactus' roots are extremely long so that they can suck water up from far away and search for the water. They also have a shallow root system to absorb surface water when there is some rain (or even dew). The trunk of the Cactus is also a part of this as it acts as a storing place for the water. The Cactus' spikes are specially there so that insects and animals don't eat it; the spikes are modified leaves, this reduces the amount of water lost through transpiration.
The Cactus' roots are extremely long so that they can suck water up from far away and search for the water. They also have a shallow root system to absorb surface water when there is some rain (or even dew). The trunk of the Cactus is also a part of this as it acts as a storing place for the water. The Cactus' spikes are specially there so that insects and animals don't eat it; the spikes are modified leaves, this reduces the amount of water lost through transpiration.
The trees and plants In the rainforest suck in carbo dioxide and Put out oxygen. Like how we breathe but in reverse.
You are dumb the answer is obvious you suck you moron the answer is cold
They have thick walls to keep water in. They have lots of roots to suck up whatever water there is. They have thin spines to protect themselves from being eaten. They have no leaves that might release water. They have pulpy centers to hold water in.
Leeches suck the blood of many rainforest animals.
A Central and/or a South American rainforest. Cages suck..
That would depend upon the species. Small cacti would take years to absorb that amount of water but a large, thirsty saguaro could absorb that in a few days.
They suck the water.
A syringe can suck water because water can change shape but cannot be compressed.