According to the international union for conservation of nature and natural resources (iucn), 73% of species have become extinct, endangered, vulnerable, or rare because of?
a. chemical pollution of water and air
b. stratospheric ozone depletion
c. overexploitation of certain species
d. alteration or destruction of the physical habitat.
e. global climate change resulting from a variety of human activities

d. alteration or destruction of the physical habitat

Explanation:

The situation with the extinction rates of the species is alarming to say the least. Around 73% of the species have gone extinct or become endangered, vulnerable, or rare. This is actually leading to a situation where the humans create a sixth mass extinction. The main reason for this are the human activities, more specifically, the alteration of the physical environment to suit the human needs, or the destruction of it. This has led to direct destruction of species, or indirect by totally destroying their habitat.

are there any answer choices

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.