The isotope helium-3 has 1 neutron and an atomic mass of 3. Helium-3 has:
1 proton
2 protons
3 protons
4 protons

2 protons

Explanation: Isotopes are atoms of the same element with the same atomic number but different atomic mass. The difference in the atomic mass is as a result of difference in the number of neutrons. Atomic number of an element is the number of protons in the nucleus of an atom while atomic mass of an element is the sum of the number of protons and neutrons in the nucleus of an atom. Atomic mass = number of protons + number of neutrons. Since helium-3 has 1 neutron and an atomic mass of 3, there its number of protons = 3-1 = 2.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.