This is a picture of more marijuana with a lump of hash (the brown lump in the middle). A small piece of hash is crumbled into the marijuana tobacco and then the whole thing is rolled into a marijuana cigarette (called a joint, a spliff, and many other names). This makes the high or buzz more immediate and stronger.
A picture of more serious drugs. The pills may be ecstacy, PCP, or one of many other drugs. The liquid and syringes may be used for heroin, morphine, or a whole host of other drugs too. Any of these drugs are extremely dangerous. Much more dangerous than marijuana or hash.