SOMEONE ANSWER ASAP Which of these is true about immunity?
A
Antibodies protect us from getting the exact same virus twice.

B
Some people get the same virus over and over again.

C
People can only get a virus if they have received the vaccine for it.

D
Most people do not ever get viruses.

What came first the elephent or the crocodile

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

When ash and dust begin to settle on the ground, they eventually become compacted by