Select all that apply.
which of the following are vertebrates?
starfish
earthworms
tunicates
crab
amphibians
lancelets
octopus
grasshopper

The correct answer is Amphibians.

Explanation:

An animal is considered as vertebrate when they have vertebral column that is extended from head to tail which protects the spinal cord in the body and also provide structural support. Those animals which do not have this vertebral column are called invertebrate.

Vertebrates comes under the sub phylum vertebrata which includes fish, mammals, birds, mammals and amphibians. Sub phylum vertebrata comes under the phylum chordata which includes both vertebrate and invertebrate.

So in this question only amphibians have vertebral column and not other so amphibians are the only vertebrates.

a physical change is being made.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.